Grigsby Grunow Co
Grigsby GrActive Patents
0
Total Holdings
7
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US1968302A | Control mechanism | Expired / Lapsed | 1928-09-14 | 1934-07-31 | 0 | Details |
| US1944138A | Electrical apparatus | Expired / Lapsed | 1931-01-12 | 1934-01-16 | 0 | Details |
| US1935371A | Electrical apparatus | Expired / Lapsed | 1930-07-12 | 1933-11-14 | 0 | Details |
| US1860348A | Radioreceiver | Expired / Lapsed | 1928-05-28 | 1932-05-31 | 0 | Details |
| US1852877A | Talking machine | Expired / Lapsed | 1926-06-23 | 1932-04-05 | 0 | Details |
| US1805626A | Radio apparatus | Expired / Lapsed | 1930-02-05 | 1931-05-19 | 0 | Details |
| US1702159A | Electrical translating unit | Expired / Lapsed | 1926-10-06 | 1929-02-12 | 0 | Details |