Thomas A Edison Inc
Thomas A EActive Patents
0
Total Holdings
48
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2764659A | Resistance type fire detector cable | Expired / Lapsed | 1955-06-27 | 1956-09-25 | 0 | Details |
| US2649078A | Gas expansion engine | Expired / Lapsed | 1951-04-04 | 1953-08-18 | 0 | Details |
| US2624767A | Primary battery | Expired / Lapsed | 1946-11-22 | 1953-01-06 | 1 | Details |
| US2606253A | Control system for phonographs of the combined recording-re… | Expired / Lapsed | 1949-10-01 | 1952-08-05 | 0 | Details |
| US2578447A | Condition-responsive system | Expired / Lapsed | 1948-06-04 | 1951-12-11 | 0 | Details |
| US2575492A | Flow-measuring apparatus | Expired / Lapsed | 1946-04-13 | 1951-11-20 | 0 | Details |
| US2561943A | Electric battery | Expired / Lapsed | 1945-12-13 | 1951-07-24 | 2 | Details |
| US2560753A | Bearing alarm system for railway trains | Expired / Lapsed | 1945-12-13 | 1951-07-17 | 0 | Details |
| US2536666A | Reel-type phonographic machine | Expired / Lapsed | 1947-01-04 | 1951-01-02 | 0 | Details |
| US2473940A | Fire alarm system | Expired / Lapsed | 1945-11-20 | 1949-06-21 | 0 | Details |
| US2461425A | Electrical measuring system | Expired / Lapsed | 1946-01-25 | 1949-02-08 | 0 | Details |
| US2456499A | Electrical control and/or measuring system | Expired / Lapsed | 1947-12-26 | 1948-12-14 | 0 | Details |
| US2448461A | Plural system of sequentially responsive instruments | Expired / Lapsed | 1945-04-27 | 1948-08-31 | 0 | Details |
| US2443252A | Pressure operated rheostat | Expired / Lapsed | 1944-11-02 | 1948-06-15 | 0 | Details |
| US2437428A | Electric motor system and method of controlling the same | Expired / Lapsed | 1943-05-19 | 1948-03-09 | 0 | Details |
| US2430538A | Telegraphone | Expired / Lapsed | 1944-06-14 | 1947-11-11 | 0 | Details |
| US2422143A | Magazine type magnetic recorder and reproducer | Expired / Lapsed | 1944-01-31 | 1947-06-10 | 0 | Details |
| US2398892A | Resistor bulb | Expired / Lapsed | 1943-07-08 | 1946-04-23 | 0 | Details |
| US2381097A | Magnetic pickup device | Expired / Lapsed | 1942-10-29 | 1945-08-07 | 0 | Details |
| US2376920A | Fire alarm system | Expired / Lapsed | 1944-06-19 | 1945-05-29 | 0 | Details |
| US2372435A | Electrical control system | Expired / Lapsed | 1940-09-14 | 1945-03-27 | 0 | Details |
| US2364556A | Telegraphone | Expired / Lapsed | 1943-11-24 | 1944-12-05 | 0 | Details |
| US2329119A | Control system | Expired / Lapsed | 1940-07-05 | 1943-09-07 | 0 | Details |
| US2320572A | Phonograph | Expired / Lapsed | 1940-05-01 | 1943-06-01 | 0 | Details |
| US2307626A | Resistance thermometer | Expired / Lapsed | 1940-07-23 | 1943-01-05 | 0 | Details |
| US2301886A | Phonograph | Expired / Lapsed | 1938-11-12 | 1942-11-10 | 0 | Details |
| US2300923A | Phonograph | Expired / Lapsed | 1941-04-19 | 1942-11-03 | 0 | Details |
| US2300803A | Method of making instrument scales by photography | Expired / Lapsed | 1939-08-17 | 1942-11-03 | 0 | Details |
| US2279227A | Phonograph | Expired / Lapsed | 1938-09-03 | 1942-04-07 | 0 | Details |
| US2251902A | Code practice set | Expired / Lapsed | 1940-09-10 | 1941-08-05 | 0 | Details |
| US2233593A | Galvanic battery | Expired / Lapsed | 1937-08-10 | 1941-03-04 | 0 | Details |
| US2222173A | Electrical control system | Expired / Lapsed | 1937-04-16 | 1940-11-19 | 0 | Details |
| US2220626A | Phonograph | Expired / Lapsed | 1939-05-19 | 1940-11-05 | 0 | Details |
| US2218542A | Phonograph | Expired / Lapsed | 1937-11-27 | 1940-10-22 | 0 | Details |
| US2208940A | Oscillation translating system | Expired / Lapsed | 1937-04-02 | 1940-07-23 | 0 | Details |
| US2184914A | Phonograph | Expired / Lapsed | 1937-10-29 | 1939-12-26 | 0 | Details |
| US2154029A | Marking device for index blanks | Expired / Lapsed | 1934-06-30 | 1939-04-11 | 0 | Details |
| US2112718A | Electric discharge device | Expired / Lapsed | 1935-07-11 | 1938-03-29 | 0 | Details |
| US2064971A | Heating unit and the production thereof | Expired / Lapsed | 1932-01-13 | 1936-12-22 | 0 | Details |
| US2042228A | Phonographic apparatus | Expired / Lapsed | 1931-12-18 | 1936-05-26 | 0 | Details |
| US2028224A | Phonograph | Expired / Lapsed | 1932-02-04 | 1936-01-21 | 0 | Details |
| US2019727A | Method of converting rough metal into molded parts | Expired / Lapsed | 1931-08-08 | 1935-11-05 | 0 | Details |
| US2016887A | Phonograph | Expired / Lapsed | 1932-01-23 | 1935-10-08 | 0 | Details |
| US2000199A | Method of sealing battery posts | Expired / Lapsed | 1931-02-26 | 1935-05-07 | 0 | Details |
| US1977433A | Electromechanical translating device | Expired / Lapsed | 1933-04-22 | 1934-10-16 | 0 | Details |
| US1702935A | Receiving apparatus for radio and telephone circuits | Expired / Lapsed | 1925-02-13 | 1929-02-19 | 0 | Details |
| US1649579A | Storage-battery electrode element and production thereof | Expired / Lapsed | 1925-07-24 | 1927-11-15 | 0 | Details |
| US1049237A | Phonograph. | Expired / Lapsed | 1911-10-06 | 1912-12-31 | 0 | Details |