Brush Development Co
Brush DeveActive Patents
0
Total Holdings
7
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2616962A | Electrical light-transmission controlling arrangement | Expired / Lapsed | 1947-10-15 | 1952-11-04 | 0 | Details |
| US2554324A | Piezoelectric device of ammonium pentaborate crystal | Expired / Lapsed | 1949-09-03 | 1951-05-22 | 0 | Details |
| US2521635A | Image retaining system | Expired / Lapsed | 1945-11-08 | 1950-09-05 | 0 | Details |
| US2460726A | Surface roughness measuring device | Expired / Lapsed | 1943-01-11 | 1949-02-01 | 0 | Details |
| US2419195A | Apparatus and method for magnetic recording | Expired / Lapsed | 1944-06-16 | 1947-04-22 | 0 | Details |
| US2378383A | Transient signal recordingreproducing device | Expired / Lapsed | 1942-10-17 | 1945-06-19 | 0 | Details |
| US2378388A | Recording and reproducing device | Expired / Lapsed | 1942-01-01 | 1945-06-19 | 0 | Details |