RADIO INVENTIONS Inc
RADIO INVEActive Patents
0
Total Holdings
6
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2173113A | Means and method for facsimile recording | Expired / Lapsed | 1936-09-25 | 1939-09-19 | 0 | Details |
| US2149292A | Facsimile system | Expired / Lapsed | 1934-06-16 | 1939-03-07 | 0 | Details |
| US2013331A | Radio receiving apparatus | Expired / Lapsed | 1932-03-31 | 1935-09-03 | 0 | Details |
| US1855933A | Acoustical instrument | Expired / Lapsed | 1927-04-07 | 1932-04-26 | 0 | Details |
| US1839522A | Socket for vacuum tubes | Expired / Lapsed | 1926-03-22 | 1932-01-05 | 0 | Details |
| US1808726A | Audio frequency coupling | Expired / Lapsed | 1928-05-09 | 1931-06-02 | 0 | Details |