Patent Explorer
Browse, filter, and analyze 7 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2616962A | Electrical light-transmission controlling arrangement | Brush Development Co | Expired / Lapsed | 1947-10-15 | 1952-11-04 | 1967-10-15 | 0.0 yrs | 0 | |
| US2554324A | Piezoelectric device of ammonium pentaborate crystal | Brush Development Co | Expired / Lapsed | 1949-09-03 | 1951-05-22 | 1969-09-03 | 0.0 yrs | 0 | |
| US2521635A | Image retaining system | Brush Development Co | Expired / Lapsed | 1945-11-08 | 1950-09-05 | 1965-11-08 | 0.0 yrs | 0 | |
| US2460726A | Surface roughness measuring device | Brush Development Co | Expired / Lapsed | 1943-01-11 | 1949-02-01 | 1963-01-11 | 0.0 yrs | 0 | |
| US2419195A | Apparatus and method for magnetic recording | Brush Development Co | Expired / Lapsed | 1944-06-16 | 1947-04-22 | 1964-06-16 | 0.0 yrs | 0 | |
| US2378383A | Transient signal recordingreproducing device | Brush Development Co | Expired / Lapsed | 1942-10-17 | 1945-06-19 | 1962-10-17 | 0.0 yrs | 0 | |
| US2378388A | Recording and reproducing device | Brush Development Co | Expired / Lapsed | 1942-01-01 | 1945-06-19 | 1962-01-01 | 0.0 yrs | 0 |