Hitachi Ltd
Hitachi LtActive Patents
0
Total Holdings
164
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| EP1442830A1 | Composite part, method of assembling the composite part, fu… | Expired / Lapsed | 2004-01-28 | — | 10 | Details |
| JPH113374A | Netting processing judgment system | Expired / Lapsed | 1997-06-11 | — | 0 | Details |
| JPH05111689A | Sewage treating equipment | Expired / Lapsed | 1991-10-23 | — | 0 | Details |
| EP0451288A1 | Data collection/transmission device and data collection sys… | Expired / Lapsed | 1990-10-12 | — | 10 | Details |
| JPH01244321A | Method for measuring temperature within living body | Expired / Lapsed | 1988-03-25 | — | 0 | Details |
| JPS6474089A | Method and device for controlling brushless motor having po… | Expired / Lapsed | 1987-09-11 | — | 0 | Details |
| EP0214654A2 | Ultrasonic device for measuring acceleration of moving refl… | Expired / Lapsed | 1986-09-10 | — | 10 | Details |
| JPS61196702A | Gas insulated compound switchgear for switchin station | Expired / Lapsed | 1985-02-27 | — | 0 | Details |
| EP0099100A1 | Gate circuit of combined field-effect and bipolar transisto… | Expired / Lapsed | 1983-07-11 | — | 33 | Details |
| JPS5946952A | Laser knife apparatus | Expired / Lapsed | 1982-09-13 | — | 0 | Details |
| JPS58200159A | How to install sound absorbing material for sonic probes | Expired / Lapsed | 1982-05-17 | — | 0 | Details |
| JPS5862838A | Recording medium for optical disc | Expired / Lapsed | 1981-10-12 | — | 0 | Details |
| EP0046298A1 | Apparatus for measuring a magnetic field | Expired / Lapsed | 1981-08-17 | — | 9 | Details |
| EP0044572A1 | Apparatus for measuring the intensity of magnetic fields by… | Expired / Lapsed | 1981-07-23 | — | 6 | Details |
| GB2072407A | Automatic signal-source selection audio or video systems | Expired / Lapsed | 1981-03-16 | — | 16 | Details |
| JPS54116610A | Hook shaped magnetic pole generator | Expired / Lapsed | 1978-03-03 | — | 0 | Details |
| DE2210159A1 | Method of fuel atomization and fuel atomization nozzle | Expired / Lapsed | 1972-03-02 | — | 0 | Details |
| DE2020830A1 | Interferometric spectrometer | Expired / Lapsed | 1970-04-28 | — | 0 | Details |
| US6516262B2 | Running control device for a vehicle | Expired / Lapsed | 2001-02-23 | 2003-02-04 | 18 | Details |
| US5655219A | Wireless LAN system capable of re-transmission under manage… | Expired / Lapsed | 1994-03-04 | 1997-08-05 | 30 | Details |
| US4344327B1 | Electronic scanning ultrasonic diagnostic system | Expired / Lapsed | 1980-12-23 | 1994-05-03 | 0 | Details |
| US5210775A | π/4 shift QPSK modulator and communication apparatus | Expired / Lapsed | 1991-02-12 | 1993-05-11 | 16 | Details |
| US5167659A | Blood coagulating apparatus | Expired / Lapsed | 1991-05-13 | 1992-12-01 | 19 | Details |
| US5152294A | Three-dimensional ultrasonic scanner | Expired / Lapsed | 1990-12-14 | 1992-10-06 | 20 | Details |
| US5153883A | Distributed timing signal generator | Expired / Lapsed | 1989-05-08 | 1992-10-06 | 26 | Details |
| US5144603A | Optical head incorporating refractive index distribution ch… | Expired / Lapsed | 1991-03-01 | 1992-09-01 | 18 | Details |
| US5140453A | Optical receiving method utilizing polarization diversity a… | Expired / Lapsed | 1988-03-11 | 1992-08-18 | 18 | Details |
| US5119314A | Semiconductor integrated circuit device | Expired / Lapsed | 1989-11-28 | 1992-06-02 | 9 | Details |
| US4366479B1 | US4366479B1 - - Google Patents | Expired / Lapsed | 1981-02-06 | 1992-03-10 | 0 | Details |
| US5060045A | Semiconductor integrated circuit device and method of manuf… | Expired / Lapsed | 1989-10-17 | 1991-10-22 | 55 | Details |
| US4573477B1 | US4573477B1 - - Google Patents | Expired / Lapsed | 1983-04-21 | 1991-10-22 | 0 | Details |
| US5018689A | Method and device for stopping vehicle at predetermined pos… | Expired / Lapsed | 1989-03-14 | 1991-05-28 | 12 | Details |
| US4985847A | Visual sensor system | Expired / Lapsed | 1988-01-13 | 1991-01-15 | 9 | Details |
| US4961427A | Ultrasonic doppler diagnostic apparatus | Expired / Lapsed | 1988-10-24 | 1990-10-09 | 12 | Details |
| US4950075A | Method of detecting an object by use of laser light and las… | Expired / Lapsed | 1989-05-02 | 1990-08-21 | 27 | Details |
| US4943938A | System for displaying shaded image of three-dimensional obj… | Expired / Lapsed | 1986-10-14 | 1990-07-24 | 5 | Details |
| US4912674A | Read-only memory | Expired / Lapsed | 1989-02-14 | 1990-03-27 | 26 | Details |
| US4887222A | Method for controlling operation of industrial robot | Expired / Lapsed | 1988-06-29 | 1989-12-12 | 6 | Details |
| US4837734A | Method and apparatus for master-slave manipulation suppleme… | Expired / Lapsed | 1987-02-26 | 1989-06-06 | 17 | Details |
| US4817052A | Semiconductor memory with an improved dummy cell arrangemen… | Expired / Lapsed | 1987-04-10 | 1989-03-28 | 15 | Details |
| US4799490A | Doppler ultrasonic diagnostic apparatus | Expired / Lapsed | 1987-03-02 | 1989-01-24 | 6 | Details |
| US4793359A | Centering balloon structure for transluminal angioplasty ca… | Expired / Lapsed | 1987-04-24 | 1988-12-27 | 12 | Details |
| US4794547A | Robot control system | Expired / Lapsed | 1986-08-15 | 1988-12-27 | 12 | Details |
| US4784451A | Waveguide optical switches | Expired / Lapsed | 1985-08-05 | 1988-11-15 | 9 | Details |
| US4783833A | Method of extracting an image of a moving object | Expired / Lapsed | 1986-11-26 | 1988-11-08 | 10 | Details |
| US4759958A | Method for forming polyimide film by chemical vapor deposit… | Expired / Lapsed | 1987-07-23 | 1988-07-26 | 8 | Details |
| US4742218A | Focus error detection apparatus utilizing focusing an front… | Expired / Lapsed | 1986-02-11 | 1988-05-03 | 15 | Details |
| US4709231A | Shading apparatus for displaying three dimensional objects | Expired / Lapsed | 1985-08-19 | 1987-11-24 | 10 | Details |
| US4709342A | Tactile sensing apparatus | Expired / Lapsed | 1984-07-31 | 1987-11-24 | 15 | Details |
| US4707621A | Multiplex control apparatus having middle value selection c… | Expired / Lapsed | 1986-04-24 | 1987-11-17 | 20 | Details |
| US4680785A | Personal-signaling communication system | Expired / Lapsed | 1984-10-03 | 1987-07-14 | 5 | Details |
| US4668970A | Semiconductor device | Expired / Lapsed | 1985-12-02 | 1987-05-26 | 8 | Details |
| US4653029A | MOS amplifier and semiconductor memory using the same | Expired / Lapsed | 1985-04-08 | 1987-03-24 | 18 | Details |
| US4638438A | Navigation apparatus for automotive | Expired / Lapsed | 1984-05-22 | 1987-01-20 | 6 | Details |
| US4604716A | Method and apparatus for controlling a robot | Expired / Lapsed | 1983-12-07 | 1986-08-05 | 17 | Details |
| US4589007A | Semiconductor integrated circuit device | Expired / Lapsed | 1983-09-06 | 1986-05-13 | 16 | Details |
| US4566765A | Apparatus for summing several ring-shape laser beams | Expired / Lapsed | 1983-10-13 | 1986-01-28 | 17 | Details |
| US4545741A | Vertical motor pump | Expired / Lapsed | 1983-05-09 | 1985-10-08 | 3 | Details |
| US4503599A | Method of fabricating field effect transistors | Expired / Lapsed | 1983-01-28 | 1985-03-12 | 20 | Details |
| US4494113A | Method and apparatus for self-control in distributed priori… | Expired / Lapsed | 1982-03-10 | 1985-01-15 | 11 | Details |
| US4484653A | Automatic driving wheel change-over apparatus | Expired / Lapsed | 1982-06-10 | 1984-11-27 | 4 | Details |
| US4481573A | Shared virtual address translation unit for a multiprocesso… | Expired / Lapsed | 1981-11-13 | 1984-11-06 | 10 | Details |
| US4453125A | Microwave alcohol fuel sensor | Expired / Lapsed | 1982-07-13 | 1984-06-05 | 18 | Details |
| US4410985A | Data transmission system and method | Expired / Lapsed | 1981-03-25 | 1983-10-18 | 23 | Details |
| US4404659A | Programmable read only memory | Expired / Lapsed | 1980-10-03 | 1983-09-13 | 13 | Details |
| US4403322A | Voice signal converting device | Expired / Lapsed | 1981-07-02 | 1983-09-06 | 13 | Details |
| US4373161A | Doppler radar mounting structure for motor vehicles | Expired / Lapsed | 1980-08-21 | 1983-02-08 | 9 | Details |
| US4363935A | Mobile radio telephone system | Expired / Lapsed | 1980-06-04 | 1982-12-14 | 7 | Details |
| US4354267A | Data transmission system utilizing loop transmission lines … | Expired / Lapsed | 1980-05-14 | 1982-10-12 | 10 | Details |
| US4346395A | Light detecting photodiode-MIS transistor device | Expired / Lapsed | 1980-03-26 | 1982-08-24 | 11 | Details |
| US4344327A | Electronic scanning ultrasonic diagnostic system | Expired / Lapsed | 1980-12-23 | 1982-08-17 | 4 | Details |
| US4343553A | Shape testing apparatus | Expired / Lapsed | 1980-08-27 | 1982-08-10 | 7 | Details |
| US4334241A | Pattern position detecting system | Expired / Lapsed | 1980-04-14 | 1982-06-08 | 8 | Details |
| US4321319A | Photosensitive compositions containing polyamides acid with… | Expired / Lapsed | 1980-05-22 | 1982-03-23 | 9 | Details |
| US4306460A | Differential pressure transducer | Expired / Lapsed | 1979-12-13 | 1981-12-22 | 16 | Details |
| US4277175A | Method and apparatus for inspecting printed wiring boards | Expired / Lapsed | 1979-09-11 | 1981-07-07 | 11 | Details |
| US4275321A | Drip-proof type electrical rotating machine | Expired / Lapsed | 1978-08-23 | 1981-06-23 | 7 | Details |
| US4272832A | Semiconductor memory device | Expired / Lapsed | 1979-05-23 | 1981-06-09 | 7 | Details |
| US4242702A | Apparatus for automatically checking external appearance of… | Expired / Lapsed | 1977-11-30 | 1980-12-30 | 26 | Details |
| US4239124A | Fluid-tight closure apparatus | Expired / Lapsed | 1978-10-20 | 1980-12-16 | 18 | Details |
| US4214305A | Multi-processor data processing system | Expired / Lapsed | 1978-06-20 | 1980-07-22 | 8 | Details |
| US4161651A | Simultaneously sampled remote data reading and transmission… | Expired / Lapsed | 1978-03-02 | 1979-07-17 | 9 | Details |
| US4161040A | Data-in amplifier for an MISFET memory device having a clam… | Expired / Lapsed | 1977-05-20 | 1979-07-10 | 27 | Details |
| US4153198A | Electro-hydraulic governor employing duplex digital control… | Expired / Lapsed | 1977-02-01 | 1979-05-08 | 32 | Details |
| US4145643A | Control apparatus for driving a pulse motor | Expired / Lapsed | 1977-05-17 | 1979-03-20 | 12 | Details |
| US4143242A | Analog-digital code converter in a digital telephone switch… | Expired / Lapsed | 1977-07-13 | 1979-03-06 | 9 | Details |
| US4136959A | Method for analyzing one ingredient of a three ingredient m… | Expired / Lapsed | 1977-01-28 | 1979-01-30 | 2 | Details |
| US4136929A | Apparatus for generating light pulse train | Expired / Lapsed | 1975-11-25 | 1979-01-30 | 53 | Details |
| US4136384A | Loop type data highway system | Expired / Lapsed | 1977-03-24 | 1979-01-23 | 6 | Details |
| US4088838A | Voice response system | Expired / Lapsed | 1976-12-20 | 1978-05-09 | 16 | Details |
| US4079803A | Electromagnetic guidance system | Expired / Lapsed | 1977-01-04 | 1978-03-21 | 5 | Details |
| US4064484A | Analog-digital converter with variable threshold levels | Expired / Lapsed | 1976-07-26 | 1977-12-20 | 11 | Details |
| US4063118A | MIS decoder providing non-floating outputs with short acces… | Expired / Lapsed | 1976-05-25 | 1977-12-13 | 11 | Details |
| US4060740A | Sensing amplifier for capacitive MISFET memory | Expired / Lapsed | 1976-05-12 | 1977-11-29 | 17 | Details |
| US4057845A | Group control system for visual information processing | Expired / Lapsed | 1976-04-06 | 1977-11-08 | 11 | Details |
| US4056844A | Memory control system using plural buffer address arrays | Expired / Lapsed | 1975-10-08 | 1977-11-01 | 9 | Details |
| US4044394A | Thin film magnetic head with a center tap | Expired / Lapsed | 1976-04-05 | 1977-08-23 | 7 | Details |
| US4024041A | Method of forming deposition films for use in multi-layer m… | Expired / Lapsed | 1975-12-16 | 1977-05-17 | 12 | Details |
| US4014000A | Pattern recognition system utilizing a plurality of partial… | Expired / Lapsed | 1976-03-29 | 1977-03-22 | 10 | Details |
| US4011402A | Scanning circuit to deliver train of pulses shifted by a co… | Expired / Lapsed | 1974-08-19 | 1977-03-08 | 9 | Details |
| US4006790A | Electromagnetic guidance system | Expired / Lapsed | 1975-01-08 | 1977-02-08 | 15 | Details |
| US3996792A | Supersonic wave flaw detecting apparatus | Expired / Lapsed | 1975-07-01 | 1976-12-14 | 14 | Details |
| US3990092A | Resistance element for semiconductor integrated circuit | Expired / Lapsed | 1975-01-13 | 1976-11-02 | 13 | Details |
| US3980899A | Word line driver circuit in memory circuit | Expired / Lapsed | 1975-02-06 | 1976-09-14 | 10 | Details |
| US3973239A | Pattern preliminary processing system | Expired / Lapsed | 1974-10-15 | 1976-08-03 | 10 | Details |
| US3944975A | Signal checking system | Expired / Lapsed | 1975-05-27 | 1976-03-16 | 7 | Details |
| US3943359A | Apparatus for relatively positioning a plurality of objects… | Expired / Lapsed | 1974-06-17 | 1976-03-09 | 11 | Details |
| US3928718A | Image reproducing system | Expired / Lapsed | 1974-05-07 | 1975-12-23 | 16 | Details |
| US3909636A | Semiconductor large scale integrated circuit chip having cu… | Expired / Lapsed | 1974-03-26 | 1975-09-30 | 14 | Details |
| US3905039A | System for band conversion of color picture signal | Expired / Lapsed | 1973-09-12 | 1975-09-09 | 18 | Details |
| US3902812A | Photometer using three kinds of light wavelengths | Expired / Lapsed | 1974-05-20 | 1975-09-02 | 8 | Details |
| US3892919A | Speech synthesis system | Expired / Lapsed | 1973-11-12 | 1975-07-01 | 5 | Details |
| US3891995A | Magnetic head | Expired / Lapsed | 1973-09-04 | 1975-06-24 | 12 | Details |
| US3889234A | Feature extractor of character and figure | Expired / Lapsed | 1973-10-04 | 1975-06-10 | 10 | Details |
| US3887762A | Inspection equipment for detecting and extracting small por… | Expired / Lapsed | 1972-11-20 | 1975-06-03 | 21 | Details |
| US3877025A | Analog to digital converter of the parallel comparison | Expired / Lapsed | 1973-09-28 | 1975-04-08 | 7 | Details |
| US3875361A | Microwave heating apparatus having automatic heating period… | Expired / Lapsed | 1973-06-13 | 1975-04-01 | 13 | Details |
| US3863220A | Loop type data highway system for data transmission | Expired / Lapsed | 1972-12-07 | 1975-01-28 | 19 | Details |
| US3849762A | Digital information processing apparatus for pattern recogn… | Expired / Lapsed | 1973-03-07 | 1974-11-19 | 7 | Details |
| US3846754A | Pattern pre-processing apparatus | Expired / Lapsed | 1973-04-04 | 1974-11-05 | 8 | Details |
| US3844484A | Method of fuel atomization and a fuel atomizer nozzle there… | Expired / Lapsed | 1973-11-21 | 1974-10-29 | 11 | Details |
| US3838904A | Hologram producing apparatus with random object beam sampli… | Expired / Lapsed | 1973-03-13 | 1974-10-01 | 16 | Details |
| US3796992A | Priority level discriminating apparatus | Expired / Lapsed | 1972-12-27 | 1974-03-12 | 19 | Details |
| US3771155A | Color display system | Expired / Lapsed | 1971-09-09 | 1973-11-06 | 14 | Details |
| US3739254A | Voltage multiplying rectifier device | Expired / Lapsed | 1971-12-21 | 1973-06-12 | 18 | Details |
| US3735365A | Data exchange system | Expired / Lapsed | 1971-09-27 | 1973-05-22 | 16 | Details |
| US3734473A | Air valve type carburetor | Expired / Lapsed | 1971-01-05 | 1973-05-22 | 21 | Details |
| US3727591A | Fuel supply control system for internal combustion engines | Expired / Lapsed | 1970-10-20 | 1973-04-17 | 6 | Details |
| US3714574A | Mobile communication system | Expired / Lapsed | 1969-04-25 | 1973-01-30 | 18 | Details |
| US3703710A | Semiconductor memory | Expired / Lapsed | 1971-01-04 | 1972-11-21 | 15 | Details |
| US3658055A | Automatic arrhythmia diagnosing system | Expired / Lapsed | 1969-04-11 | 1972-04-25 | 14 | Details |
| US3654543A | Pulse transformer for firing thyristors | Expired / Lapsed | 1970-11-02 | 1972-04-04 | 17 | Details |
| US3636360A | Apparatus for detection of liquid level in transparent tube… | Expired / Lapsed | 1969-05-12 | 1972-01-18 | 9 | Details |
| US3634689A | Automatic position or condition control devices using relat… | Expired / Lapsed | 1969-04-22 | 1972-01-11 | 15 | Details |
| US3631457A | Display apparatus | Expired / Lapsed | 1969-09-08 | 1971-12-28 | 6 | Details |
| US3618042A | Error detection and instruction reexecution device in a dat… | Expired / Lapsed | 1969-10-29 | 1971-11-02 | 11 | Details |
| US3618041A | Memory control system | Expired / Lapsed | 1969-10-29 | 1971-11-02 | 15 | Details |
| US3618040A | Memory control apparatus in multiprocessor system | Expired / Lapsed | 1969-09-17 | 1971-11-02 | 11 | Details |
| US3614747A | Instruction buffer system | Expired / Lapsed | 1969-10-29 | 1971-10-19 | 14 | Details |
| US3614564A | Readhesion apparatus for vehicles | Expired / Lapsed | 1968-07-22 | 1971-10-19 | 9 | Details |
| US3611315A | Memory control system for controlling a buffer memory | Expired / Lapsed | 1969-10-08 | 1971-10-05 | 10 | Details |
| US3607449A | Method of forming a junction by ion implantation | Expired / Lapsed | 1969-09-23 | 1971-09-21 | 9 | Details |
| US3606882A | Eog processing system for p-and qrswave characteristics | Expired / Lapsed | 1969-04-11 | 1971-09-21 | 0 | Details |
| US3599000A | Semiconductor optoelectronic logic element utilizing the gu… | Expired / Lapsed | 1969-03-13 | 1971-08-10 | 8 | Details |
| US3581291A | Memory control system in multiprocessing system | Expired / Lapsed | 1969-10-29 | 1971-05-25 | 15 | Details |
| US3581192A | Frequency spectrum analyzer with displayable colored shifta… | Expired / Lapsed | 1968-11-13 | 1971-05-25 | 12 | Details |
| US3581097A | Solid-state image pickup device | Expired / Lapsed | 1967-03-13 | 1971-05-25 | 10 | Details |
| US3556225A | Automatic level control system for earth moving machines | Expired / Lapsed | 1968-07-30 | 1971-01-19 | 2 | Details |
| US3555253A | Numerical control system | Expired / Lapsed | 1967-02-20 | 1971-01-12 | 8 | Details |
| US3534388A | Plasma jet cutting process | Expired / Lapsed | 1969-03-10 | 1970-10-13 | 0 | Details |
| US3506837A | Pattern-detecting device using series connected photosensit… | Expired / Lapsed | 1966-12-13 | 1970-04-14 | 0 | Details |
| US3504430A | Method of making semiconductor devices having insulating fi… | Expired / Lapsed | 1967-06-13 | 1970-04-07 | 0 | Details |
| US3484313A | Method of manufacturing semiconductor devices | Expired / Lapsed | 1966-03-23 | 1969-12-16 | 0 | Details |
| US3377597A | Recorder for analyzing particle size distributions of powde… | Expired / Lapsed | 1965-12-08 | 1968-04-09 | 0 | Details |
| US3355646A | Optimum driving method for step motors | Expired / Lapsed | 1965-04-07 | 1967-11-28 | 2 | Details |
| US3345222A | Method of forming a semiconductor device by etching and epi… | Expired / Lapsed | 1964-09-23 | 1967-10-03 | 2 | Details |
| US3328761A | Character reading system by detection between electron scan… | Expired / Lapsed | 1964-05-20 | 1967-06-27 | 2 | Details |
| US3327191A | Two-phase reversible step motor | Expired / Lapsed | 1963-07-29 | 1967-06-20 | 2 | Details |
| US3311756A | Electronic circuit having a fieldeffect transistor therein | Expired / Lapsed | 1964-06-19 | 1967-03-28 | 2 | Details |
| US3299407A | Electronic digital computer provided with a drum type memor… | Expired / Lapsed | 1963-08-06 | 1967-01-17 | 2 | Details |
| US3284750A | Low-temperature, negative-resistance element | Expired / Lapsed | 1964-03-25 | 1966-11-08 | 2 | Details |
| US3274553A | Time-division, multiplex, numericalcontrol system | Expired / Lapsed | 1963-01-17 | 1966-09-20 | 0 | Details |
| US3241603A | Automatic temperature control system | Expired / Lapsed | 1964-03-10 | 1966-03-22 | 0 | Details |
| US3242405A | Brushless electric motor | Expired / Lapsed | 1963-04-23 | 1966-03-22 | 2 | Details |