National Research Development Corp UK
National RActive Patents
0
Total Holdings
148
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| DE8601068U1 | Orthopedic instrument, in particular for bone biopsy | Expired / Lapsed | 1986-01-17 | — | 0 | Details |
| EP0055032A2 | Field effect transistors | Expired / Lapsed | 1981-11-25 | — | 13 | Details |
| WO1979000841A1 | Speckle interferometric measurement of small oscillatory mo… | Expired / Lapsed | 1979-03-09 | — | 0 | Details |
| US4319186A | Signal sensors | Expired / Lapsed | 1979-04-30 | 1982-03-09 | 8 | Details |
| US4284351A | Processing of digital signals | Expired / Lapsed | 1980-05-21 | 1981-08-18 | 6 | Details |
| US4204283A | Prosthetic valve | Expired / Lapsed | 1978-05-03 | 1980-05-27 | 15 | Details |
| US4166695A | Method and apparatus for measuring retinal blood flow | Expired / Lapsed | 1977-03-29 | 1979-09-04 | 9 | Details |
| US4119946A | Comparison apparatus, e.g. for use in character recognition | Expired / Lapsed | 1977-05-20 | 1978-10-10 | 17 | Details |
| US4115730A | Nuclear magnetic resonance apparatus and methods | Expired / Lapsed | 1977-04-07 | 1978-09-19 | 10 | Details |
| US4114188A | Apparatus for indicating uterine activity in labor | Expired / Lapsed | 1977-01-05 | 1978-09-12 | 25 | Details |
| US4107780A | Display apparatus | Expired / Lapsed | 1977-01-25 | 1978-08-15 | 14 | Details |
| US4085466A | Prosthetic joint device | Expired / Lapsed | 1977-08-04 | 1978-04-25 | 15 | Details |
| US4079801A | Vehicle guidance systems | Expired / Lapsed | 1976-08-03 | 1978-03-21 | 12 | Details |
| US4070643A | Acoustic holography apparatus | Expired / Lapsed | 1976-06-22 | 1978-01-24 | 15 | Details |
| US4068951A | Distance measuring apparatus | Expired / Lapsed | 1976-04-27 | 1978-01-17 | 11 | Details |
| US4059102A | Bone securing devices | Expired / Lapsed | 1976-09-30 | 1977-11-22 | 3 | Details |
| US4053585A | Immunological preparations | Expired / Lapsed | 1975-06-25 | 1977-10-11 | 20 | Details |
| US4024531A | Display devices | Expired / Lapsed | 1975-03-03 | 1977-05-17 | 3 | Details |
| US4021726A | Image formation using nuclear magnetic resonance | Expired / Lapsed | 1975-09-04 | 1977-05-03 | 11 | Details |
| US4015196A | Analysis of materials | Expired / Lapsed | 1975-04-03 | 1977-03-29 | 9 | Details |
| US3992726A | Endoprosthetic bone joint devices | Expired / Lapsed | 1975-07-30 | 1976-11-23 | 9 | Details |
| US3987673A | Ultrasonic transducer devices | Expired / Lapsed | 1975-01-03 | 1976-10-26 | 18 | Details |
| US3977289A | Saws and blades therefor | Expired / Lapsed | 1975-04-24 | 1976-08-31 | 3 | Details |
| US3965489A | Endoprosthetic bone joint device for the talo-navicular joi… | Expired / Lapsed | 1975-04-09 | 1976-06-29 | 8 | Details |
| US3958565A | Ventilatory capacity measuring instrument | Expired / Lapsed | 1974-07-12 | 1976-05-25 | 4 | Details |
| US3946445A | Endoprosthetic bone joint | Expired / Lapsed | 1975-04-30 | 1976-03-30 | 8 | Details |
| US3947673A | Apparatus for comparing two binary signals | Expired / Lapsed | 1974-08-23 | 1976-03-30 | 9 | Details |
| US3938379A | Electromechanical transducer | Expired / Lapsed | 1974-01-10 | 1976-02-17 | 25 | Details |
| US3911902A | Catheter pressure transducer | Expired / Lapsed | 1973-08-23 | 1975-10-14 | 13 | Details |
| US3906197A | Apparatus and methods for computer graphics | Expired / Lapsed | 1974-03-05 | 1975-09-16 | 24 | Details |
| US3905105A | Saws and blades therefor | Expired / Lapsed | 1974-01-07 | 1975-09-16 | 11 | Details |
| US3889665A | Apparatus and method for pressurizing gap-filling cement to… | Expired / Lapsed | 1973-03-07 | 1975-06-17 | 15 | Details |
| US3879766A | Endoprosthetic bone joint device | Expired / Lapsed | 1973-10-11 | 1975-04-29 | 10 | Details |
| US3869729A | Bone joint prosthesis | Expired / Lapsed | 1972-12-29 | 1975-03-11 | 13 | Details |
| US3853712A | Cell culture systems | Expired / Lapsed | 1972-02-08 | 1974-12-10 | 15 | Details |
| US3842442A | Endoprosthetic shoulder joint | Expired / Lapsed | 1973-09-04 | 1974-10-22 | 14 | Details |
| US3829904A | Hip joint prostheses | Expired / Lapsed | 1972-09-22 | 1974-08-20 | 13 | Details |
| US3816855A | Knee joint prosthesis | Expired / Lapsed | 1972-05-30 | 1974-06-18 | 11 | Details |
| US3815157A | Prosthetic shoulder joint devices | Expired / Lapsed | 1972-11-22 | 1974-06-11 | 9 | Details |
| US3816649A | Optical inspection | Expired / Lapsed | 1972-06-19 | 1974-06-11 | 30 | Details |
| US3814082A | Patient monitoring systems | Expired / Lapsed | 1972-03-17 | 1974-06-04 | 9 | Details |
| US3807394A | Fracture fixing device | Expired / Lapsed | 1972-08-03 | 1974-04-30 | 13 | Details |
| US3793650A | Prosthetic bone joint having a spacer device | Expired / Lapsed | 1972-09-22 | 1974-02-26 | 3 | Details |
| US3762416A | Artery entry tool | Expired / Lapsed | 1971-05-26 | 1973-10-02 | 5 | Details |
| US3751391A | Zinc oxide-poly(acrylic acid)surgical cements | Expired / Lapsed | 1971-10-28 | 1973-08-07 | 0 | Details |
| US3742433A | Detection apparatus | Expired / Lapsed | 1971-06-18 | 1973-06-26 | 5 | Details |
| US3719083A | Flowmeters | Expired / Lapsed | 1971-03-29 | 1973-03-06 | 6 | Details |
| US3718134A | Implantable electrode connector device | Expired / Lapsed | 1971-04-13 | 1973-02-27 | 6 | Details |
| US3707959A | Method and apparatus for monitoring electrocardiac signals | Expired / Lapsed | 1970-07-13 | 1973-01-02 | 16 | Details |
| US3698017A | Prosthetic acetabular devices | Expired / Lapsed | 1970-07-29 | 1972-10-17 | 7 | Details |
| US3685509A | Foetal blood sampling endoscope | Expired / Lapsed | 1970-07-07 | 1972-08-22 | 7 | Details |
| US3550446A | Electromagnetic flowmeters | Expired / Lapsed | 1969-02-28 | 1970-12-29 | 0 | Details |
| US3547539A | Distance measurement | Expired / Lapsed | 1967-11-24 | 1970-12-15 | 0 | Details |
| US3534803A | Method of casting in a permanent carbon mold | Expired / Lapsed | 1967-04-20 | 1970-10-20 | 0 | Details |
| US3528109A | Prosthetic bone joint socket | Expired / Lapsed | 1968-01-31 | 1970-09-15 | 0 | Details |
| US3513931A | Vehicle automatic guidance means | Expired / Lapsed | 1967-07-26 | 1970-05-26 | 0 | Details |
| US3509807A | Photographic apparatus | Expired / Lapsed | 1967-05-15 | 1970-05-05 | 0 | Details |
| US3508828A | Distance measuring apparatus | Expired / Lapsed | 1966-11-14 | 1970-04-28 | 0 | Details |
| US3505993A | Electrocardiograph electrodes with surface convexities | Expired / Lapsed | 1965-12-17 | 1970-04-14 | 0 | Details |
| US3498132A | Radiometer apparatus | Expired / Lapsed | 1968-02-23 | 1970-03-03 | 0 | Details |
| US3488690A | Artificial kidney membrane support means | Expired / Lapsed | 1967-10-11 | 1970-01-06 | 0 | Details |
| US3486500A | Osteotomy plate | Expired / Lapsed | 1966-09-14 | 1969-12-30 | 0 | Details |
| US3448310A | Dynamo-electric machines of the reluctance type | Expired / Lapsed | 1967-08-15 | 1969-06-03 | 0 | Details |
| US3435329A | Scr type alternating current electric power control | Expired / Lapsed | 1966-03-15 | 1969-03-25 | 0 | Details |
| US3431996A | Vehicle guidance system | Expired / Lapsed | 1965-09-20 | 1969-03-11 | 0 | Details |
| US3409370A | Apparatus for measurement of lengths and of other physical … | Expired / Lapsed | 1963-11-21 | 1968-11-05 | 0 | Details |
| US3400216A | Speech recognition apparatus | Expired / Lapsed | 1965-02-01 | 1968-09-03 | 0 | Details |
| US3398481A | Method and apparatus for controlling carbon dioxide concent… | Expired / Lapsed | 1966-05-20 | 1968-08-27 | 0 | Details |
| US3396409A | Artificial heart valve | Expired / Lapsed | 1965-12-09 | 1968-08-13 | 2 | Details |
| US3381672A | Impulse forming and like machines | Expired / Lapsed | 1966-04-04 | 1968-05-07 | 0 | Details |
| US3369228A | Environment identification system | Expired / Lapsed | 1964-08-26 | 1968-02-13 | 2 | Details |
| US3366922A | Blind aid | Expired / Lapsed | 1966-04-11 | 1968-01-30 | 0 | Details |
| US3365840A | Crop growing device | Expired / Lapsed | 1965-11-15 | 1968-01-30 | 1 | Details |
| US3349377A | Electrical digital computing engines | Expired / Lapsed | 1964-07-13 | 1967-10-24 | 2 | Details |
| US3324237A | Television and like data transmission systems | Expired / Lapsed | 1963-08-26 | 1967-06-06 | 2 | Details |
| US3319622A | Device for gastro-intestinal fluids | Expired / Lapsed | 1963-12-26 | 1967-05-16 | 2 | Details |
| US3276822A | Braking of motor vehicles | Expired / Lapsed | 1964-06-22 | 1966-10-04 | 2 | Details |
| US3268232A | Shaft seal assemblies | Expired / Lapsed | 1963-04-25 | 1966-08-23 | 2 | Details |
| US3206642A | Electrical circuit breakers | Expired / Lapsed | 1962-07-17 | 1965-09-14 | 2 | Details |
| US3200698A | Measurement of distance by means of modulated polarized lig… | Expired / Lapsed | 1961-09-18 | 1965-08-17 | 1 | Details |
| US3172075A | Apparatus for furnishing information as to positioning of o… | Expired / Lapsed | 1962-01-02 | 1965-03-02 | 2 | Details |
| US3144390A | Process for the purification of interferon | Expired / Lapsed | 1961-06-21 | 1964-08-11 | 2 | Details |
| US3138955A | Fluid measuring apparatus | Expired / Lapsed | 1961-05-08 | 1964-06-30 | 2 | Details |
| US3099833A | Method of radio scanning | Expired / Lapsed | 1959-03-17 | 1963-07-30 | 2 | Details |
| US3074804A | Intergranular barrier layer dielectric ceramic compositions… | Expired / Lapsed | 1958-11-28 | 1963-01-22 | 2 | Details |
| US3073311A | Sewing device | Expired / Lapsed | 1959-11-02 | 1963-01-15 | 2 | Details |
| US3062962A | Photo-electron image multiplier | Expired / Lapsed | 1957-11-25 | 1962-11-06 | 0 | Details |
| US3045911A | Automatic control systems | Expired / Lapsed | 1957-07-01 | 1962-07-24 | 0 | Details |
| US3016518A | System for analysing the spatial distribution of a function | Expired / Lapsed | 1956-02-13 | 1962-01-09 | 0 | Details |
| US3015612A | Continuous fermentation apparatus for the production of a c… | Expired / Lapsed | 1958-02-18 | 1962-01-02 | 2 | Details |
| US3006991A | Signal transmission systems | Expired / Lapsed | 1959-10-02 | 1961-10-31 | 0 | Details |
| US3004077A | Manufacture of fluorinated aromatic compounds | Expired / Lapsed | 1959-09-04 | 1961-10-10 | 2 | Details |
| US2996649A | Motor control system | Expired / Lapsed | 1960-04-18 | 1961-08-15 | 0 | Details |
| US2979623A | Velocity indicator | Expired / Lapsed | 1959-06-26 | 1961-04-11 | 0 | Details |
| US2958860A | Digital encoders | Expired / Lapsed | 1956-08-01 | 1960-11-01 | 0 | Details |
| US2931958A | Semi-conductor devices | Expired / Lapsed | 1955-04-19 | 1960-04-05 | 0 | Details |
| US2929949A | Method of and apparatus for electron multiplication | Expired / Lapsed | 1957-02-08 | 1960-03-22 | 0 | Details |
| US2902217A | Control gating means for a digital computer | Expired / Lapsed | 1954-02-01 | 1959-09-01 | 0 | Details |
| US2891723A | Programmed control means for data transfer apparatus | Expired / Lapsed | 1952-05-26 | 1959-06-23 | 0 | Details |
| US2856126A | Multiplying arrangements for electronic digital computing m… | Expired / Lapsed | 1954-04-13 | 1958-10-14 | 0 | Details |
| CA561797A | Pulse sorter | Expired / Lapsed | — | 1958-08-12 | 0 | Details |
| US2846142A | Electronic digital computing engines | Expired / Lapsed | 1954-08-25 | 1958-08-05 | 0 | Details |
| US2845609A | Methods of recording digital information | Expired / Lapsed | 1951-11-13 | 1958-07-29 | 0 | Details |
| US2840304A | Data storage arrangements for electronic digital computing … | Expired / Lapsed | 1951-05-17 | 1958-06-24 | 0 | Details |
| US2832259A | Optical measuring systems | Expired / Lapsed | 1956-02-14 | 1958-04-29 | 0 | Details |
| US2825687A | Transparent conducting films | Expired / Lapsed | 1953-04-01 | 1958-03-04 | 2 | Details |
| US2810516A | Electronic digital computing devices | Expired / Lapsed | 1950-06-01 | 1957-10-22 | 0 | Details |
| US2809905A | Melting and refining metals | Expired / Lapsed | 1956-12-21 | 1957-10-15 | 2 | Details |
| US2800055A | Micromanipulating devices | Expired / Lapsed | 1954-04-09 | 1957-07-23 | 0 | Details |
| US2800278A | Number signal analysing means for electronic digital comput… | Expired / Lapsed | 1951-05-17 | 1957-07-23 | 0 | Details |
| US2800277A | Controlling arrangements for electronic digital computing m… | Expired / Lapsed | 1951-05-17 | 1957-07-23 | 0 | Details |
| US2799449A | Data storage transfer means for a digital computer | Expired / Lapsed | 1951-04-23 | 1957-07-16 | 0 | Details |
| US2796464A | Electrical pulse signalling systems | Expired / Lapsed | 1954-04-26 | 1957-06-18 | 0 | Details |
| US2795729A | Cathode ray tube | Expired / Lapsed | 1955-11-29 | 1957-06-11 | 0 | Details |
| US2789759A | Electronic digital computing machines | Expired / Lapsed | 1950-06-21 | 1957-04-23 | 0 | Details |
| US2786628A | Electronic digital computing devices | Expired / Lapsed | 1951-04-11 | 1957-03-26 | 0 | Details |
| US2785855A | Electrical storage apparatus | Expired / Lapsed | 1950-11-24 | 1957-03-19 | 0 | Details |
| US2777635A | Electronic digital computing machines | Expired / Lapsed | 1950-08-14 | 1957-01-15 | 0 | Details |
| US2776794A | Electronic circuit for multiplying binary numbers | Expired / Lapsed | 1950-03-13 | 1957-01-08 | 0 | Details |
| US2772050A | Electronic digital computing machines | Expired / Lapsed | 1950-06-21 | 1956-11-27 | 0 | Details |
| US2770166A | Improvements in and relating to optical apparatus for produ… | Expired / Lapsed | 1952-06-30 | 1956-11-13 | 0 | Details |
| US2767908A | Electronic digital computing machines | Expired / Lapsed | 1951-08-14 | 1956-10-23 | 0 | Details |
| US2757864A | Information translating apparatus | Expired / Lapsed | 1951-08-28 | 1956-08-07 | 0 | Details |
| US2755994A | Electronic digital computing device | Expired / Lapsed | 1950-01-30 | 1956-07-24 | 0 | Details |
| US2750499A | Circuits for ultrasonic delay lines | Expired / Lapsed | 1951-01-08 | 1956-06-12 | 0 | Details |
| US2721732A | Apparatus for mixing liquids and gases | Expired / Lapsed | 1952-12-23 | 1955-10-25 | 2 | Details |
| US2716708A | Apparatus for launching ultrasonic waves | Expired / Lapsed | 1951-11-13 | 1955-08-30 | 0 | Details |
| US2715712A | Integrating circuits | Expired / Lapsed | 1950-08-16 | 1955-08-16 | 0 | Details |
| US2701303A | Electronic valve circuits | Expired / Lapsed | 1950-03-01 | 1955-02-01 | 0 | Details |
| US2700696A | Electrical signaling and/or amplifying systems | Expired / Lapsed | 1951-06-07 | 1955-01-25 | 0 | Details |
| US2700155A | Electrical signaling system | Expired / Lapsed | 1954-04-19 | 1955-01-18 | 0 | Details |
| US2693907A | Electronic computing circuits | Expired / Lapsed | 1950-01-03 | 1954-11-09 | 0 | Details |
| US2686632A | Digital computer | Expired / Lapsed | 1950-12-26 | 1954-08-17 | 0 | Details |
| US2685407A | Circuit for multiplying binary numbers | Expired / Lapsed | 1949-12-12 | 1954-08-03 | 0 | Details |
| US2685041A | Apparatus for examining materials by ultrasonic shear vibra… | Expired / Lapsed | 1951-11-13 | 1954-07-27 | 0 | Details |
| US2683802A | Pulse selecting circuits | Expired / Lapsed | 1949-12-12 | 1954-07-13 | 0 | Details |
| US2679978A | Pulse scaling system | Expired / Lapsed | 1951-01-19 | 1954-06-01 | 0 | Details |
| US2671607A | Electronic digital computing apparatus | Expired / Lapsed | 1949-10-03 | 1954-03-09 | 0 | Details |
| US2660922A | Interference microscope | Expired / Lapsed | 1949-05-31 | 1953-12-01 | 0 | Details |
| US2653231A | Amplitude-discriminating circuits | Expired / Lapsed | 1948-10-13 | 1953-09-22 | 0 | Details |
| US2652554A | Magnetic storage system for electronic binary digital compu… | Expired / Lapsed | 1950-02-27 | 1953-09-15 | 0 | Details |
| US2651717A | Electronic valve circuits | Expired / Lapsed | 1950-06-12 | 1953-09-08 | 0 | Details |
| US2648061A | Cathode-ray tube display system | Expired / Lapsed | 1947-12-29 | 1953-08-04 | 0 | Details |
| US2643820A | Circuit for adding binary numbers | Expired / Lapsed | 1949-12-12 | 1953-06-30 | 0 | Details |
| US2642550A | Electronic information storage device | Expired / Lapsed | 1951-01-11 | 1953-06-16 | 0 | Details |
| US2636983A | Pulse analyzer | Expired / Lapsed | 1948-05-20 | 1953-04-28 | 0 | Details |
| US2562987A | Utility radar system | Expired / Lapsed | 1947-07-30 | 1951-08-07 | 0 | Details |
| US2552022A | Expanded sweep and calibrated marker for cathode-ray tube t… | Expired / Lapsed | 1947-07-30 | 1951-05-08 | 0 | Details |