Patent US2354591A successfully refreshed from Google Patents.
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Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2122750A | Line television | Expired / Lapsed | 1934-07-05 | 1938-07-05 | 0 | Details |
| US2100348A | Light beam transmission system | Expired / Lapsed | 1934-04-13 | 1937-11-30 | 0 | Details |
| US2081367A | Electrical weighing and distribution system | Expired / Lapsed | 1934-09-18 | 1937-05-25 | 0 | Details |
| US2072527A | Multiple sound and picture recording and projection system | Expired / Lapsed | 1930-05-27 | 1937-03-02 | 0 | Details |
| US2071564A | Cyclic variable frequency oscillator | Expired / Lapsed | 1930-12-30 | 1937-02-23 | 0 | Details |
| US2021743A | Multiplex signaling | Expired / Lapsed | 1930-06-13 | 1935-11-19 | 0 | Details |
| US2007211A | Electrical transmission and direction finding system | Expired / Lapsed | 1931-06-02 | 1935-07-09 | 0 | Details |
| US2005153A | Synchronizing system | Expired / Lapsed | 1931-12-09 | 1935-06-18 | 0 | Details |
| US1975517A | Piezoelectric crystal convertergenerator | Expired / Lapsed | 1931-05-02 | 1934-10-02 | 0 | Details |
| US1972491A | Electrical repeater tube | Expired / Lapsed | 1932-03-22 | 1934-09-04 | 0 | Details |
| US1955471A | Polyphase converter-generator | Expired / Lapsed | 1931-08-13 | 1934-04-17 | 0 | Details |
| US1951523A | Electrooptic control system | Expired / Lapsed | 1930-07-24 | 1934-03-20 | 0 | Details |
| US1925814A | Continuous facsimile transmission system | Expired / Lapsed | 1930-09-25 | 1933-09-05 | 0 | Details |
| US1901116A | Color television | Expired / Lapsed | 1930-05-08 | 1933-03-14 | 0 | Details |
| US1779748A | High-speed television system | Expired / Lapsed | 1927-09-28 | 1930-10-28 | 0 | Details |