Telephon Apparat Fabrik E Zwietusch and Co
Telephon AActive Patents
0
Total Holdings
8
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB365022A | Improvements in or relating to telephone paystations | Expired / Lapsed | 1931-08-12 | — | 0 | Details |
| US2268859A | Impulse sender | Expired / Lapsed | 1937-09-03 | 1942-01-06 | 0 | Details |
| DE704414C | Switch memories, in particular numerators for telephone sys… | Expired / Lapsed | 1936-09-27 | 1941-03-29 | 0 | Details |
| DE665674C | Control device for multiple switches with only one switch e… | Expired / Lapsed | 1936-02-21 | 1938-09-30 | 0 | Details |
| US2085265A | Control station for postal pneumatic tube plants | Expired / Lapsed | 1932-11-11 | 1937-06-29 | 0 | Details |
| US2082561A | Paystation telephone system | Expired / Lapsed | 1936-02-13 | 1937-06-01 | 0 | Details |
| US2066614A | Relay circuit | Expired / Lapsed | 1935-06-17 | 1937-01-05 | 0 | Details |
| DE547122C | Electric capacitor in a housing made of cardboard, pressboa… | Expired / Lapsed | 1930-03-12 | 1932-03-19 | 0 | Details |