MOTOR IMPROVEMENTS Inc
MOTOR IMPRActive Patents
0
Total Holdings
6
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2239868A | Filter | Expired / Lapsed | 1938-10-27 | 1941-04-29 | 0 | Details |
| US2218800A | Filter | Expired / Lapsed | 1937-11-05 | 1940-10-22 | 0 | Details |
| US2196821A | Filter | Expired / Lapsed | 1938-05-14 | 1940-04-09 | 0 | Details |
| US2186440A | Filtering unit and method of making the same | Expired / Lapsed | 1937-08-03 | 1940-01-09 | 0 | Details |
| US2158512A | Filter | Expired / Lapsed | 1937-08-19 | 1939-05-16 | 0 | Details |
| US2042537A | Filter and method of making same | Expired / Lapsed | 1931-02-06 | 1936-06-02 | 0 | Details |