Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Fides GeseActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2286428A | Arrangement for tuning parallel wire lines | Expired / Lapsed | 1940-06-14 | 1942-06-16 | 0 | Details |
| US2272353A | Electronic microscope | Expired / Lapsed | 1940-08-20 | 1942-02-10 | 0 | Details |
| US2267714A | Device for producing filters | Expired / Lapsed | 1939-04-29 | 1941-12-30 | 0 | Details |
| US2267752A | Arrangement for producing filters and ultra filters | Expired / Lapsed | 1939-01-23 | 1941-12-30 | 0 | Details |
| US2266215A | Telephone system | Expired / Lapsed | 1939-12-21 | 1941-12-16 | 0 | Details |
| US2253864A | Switching arrangement for electron microscopes | Expired / Lapsed | 1939-06-14 | 1941-08-26 | 0 | Details |
| US2242042A | Cold cathode for electric vacuum tubes | Expired / Lapsed | 1940-08-03 | 1941-05-13 | 0 | Details |
| US2228958A | Cathode ray tube | Expired / Lapsed | 1940-02-24 | 1941-01-14 | 0 | Details |
| US2224934A | Easily machinable magnetizable body having a small coercive… | Expired / Lapsed | 1939-02-11 | 1940-12-17 | 0 | Details |
| US2221105A | Electric filter | Expired / Lapsed | 1939-05-06 | 1940-11-12 | 0 | Details |
| US2153131A | High frequency oscillator | Expired / Lapsed | 1938-10-22 | 1939-04-04 | 0 | Details |