Specialties Development Corp
SpecialtieActive Patents
0
Total Holdings
22
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3339194A | Photosensitive intruder detecting system using alternately … | Expired / Lapsed | 1964-06-26 | 1967-08-29 | 2 | Details |
| US3281817A | Intruder detection | Expired / Lapsed | 1964-07-02 | 1966-10-25 | 2 | Details |
| US3237183A | Watchman tour monitoring system | Expired / Lapsed | 1963-12-16 | 1966-02-22 | 2 | Details |
| US3161742A | Magnetic intruder and fire deterctor | Expired / Lapsed | 1961-08-24 | 1964-12-15 | 0 | Details |
| US3118139A | Speed measuring apparatus | Expired / Lapsed | 1959-11-25 | 1964-01-14 | 2 | Details |
| US3110088A | Method of making resistance elements | Expired / Lapsed | 1962-04-06 | 1963-11-12 | 2 | Details |
| US3076566A | Warehousing system | Expired / Lapsed | 1959-06-18 | 1963-02-05 | 2 | Details |
| US3016506A | Semi-conductive element | Expired / Lapsed | 1960-02-01 | 1962-01-09 | 0 | Details |
| US3011718A | Control network for air conditioning units | Expired / Lapsed | 1958-12-17 | 1961-12-05 | 0 | Details |
| US2967252A | System for supplying controlled frequency power | Expired / Lapsed | 1958-08-04 | 1961-01-03 | 0 | Details |
| FR1225255A | Electronic relay | Expired / Lapsed | 1959-05-22 | 1960-06-30 | 0 | Details |
| US2938704A | Seal for reciprocating valve | Expired / Lapsed | 1957-04-02 | 1960-05-31 | 0 | Details |
| US2901740A | Electrical network automatically responsive to a change in … | Expired / Lapsed | 1956-11-23 | 1959-08-25 | 0 | Details |
| US2871197A | Resistance material for fire detector element | Expired / Lapsed | 1954-10-26 | 1959-01-27 | 2 | Details |
| US2837809A | Process of producing fabric containing kinky woolen pile | Expired / Lapsed | 1955-07-05 | 1958-06-10 | 0 | Details |
| US2792568A | Network for detecting the failure of the insulation of elec… | Expired / Lapsed | 1955-03-04 | 1957-05-14 | 0 | Details |
| US2790873A | Deformation switch | Expired / Lapsed | 1953-05-08 | 1957-04-30 | 0 | Details |
| US2728827A | Deformable switch | Expired / Lapsed | 1953-03-23 | 1955-12-27 | 0 | Details |
| US2644934A | Fluid sampling apparatus | Expired / Lapsed | 1948-01-02 | 1953-07-07 | 0 | Details |
| US2626361A | Apparatus for detecting suspended matter in fluids | Expired / Lapsed | 1950-09-22 | 1953-01-20 | 0 | Details |
| US2485588A | Apparatus for visual detection of illuminated suspended mat… | Expired / Lapsed | 1944-12-23 | 1949-10-25 | 0 | Details |
| US2410763A | Vibration preventing syphon tube support | Expired / Lapsed | 1942-10-21 | 1946-11-05 | 0 | Details |