National Pneumatic Co Inc
National PActive Patents
0
Total Holdings
19
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3000361A | Push door mechanism | Expired / Lapsed | 1959-11-06 | 1961-09-19 | 0 | Details |
| US2832588A | Control system for power operated doors equipped with obstr… | Expired / Lapsed | 1954-11-19 | 1958-04-29 | 0 | Details |
| US2343316A | Door operator | Expired / Lapsed | 1943-03-30 | 1944-03-07 | 0 | Details |
| US2237112A | Reeling mechanism | Expired / Lapsed | 1939-12-02 | 1941-04-01 | 0 | Details |
| US2179815A | Valve mechanism | Expired / Lapsed | 1938-08-19 | 1939-11-14 | 0 | Details |
| US1975828A | Pneumatic treadle control mechanism | Expired / Lapsed | 1933-08-04 | 1934-10-09 | 0 | Details |
| US1944157A | Switch mechanism | Expired / Lapsed | 1932-11-05 | 1934-01-23 | 0 | Details |
| US1915292A | Compressible mat electric treadle | Expired / Lapsed | 1932-05-21 | 1933-06-27 | 0 | Details |
| US1911987A | Fuel tank filling and protecting device | Expired / Lapsed | 1932-06-15 | 1933-05-30 | 0 | Details |
| US1906699A | Vehicle control for brake and door apparatus | Expired / Lapsed | 1930-05-28 | 1933-05-02 | 0 | Details |
| US1890809A | Sensitive door edge switch | Expired / Lapsed | 1932-03-29 | 1932-12-13 | 0 | Details |
| US1793716A | Electric-engine device for safety doors | Expired / Lapsed | 1928-04-28 | 1931-02-24 | 0 | Details |
| US1790168A | Control valve for car doors | Expired / Lapsed | 1925-06-06 | 1931-01-27 | 0 | Details |
| US1576950A | Safety shoe-tripping mechanism for doors | Expired / Lapsed | 1921-04-11 | 1926-03-16 | 0 | Details |
| US1496154A | Pneumatic-motor mechanism | Expired / Lapsed | 1917-04-25 | 1924-06-03 | 0 | Details |
| US1477771A | Automatic automobile lock | Expired / Lapsed | 1919-03-22 | 1923-12-18 | 0 | Details |
| US1427212A | Door-controlled locking mechanism for vehicles | Expired / Lapsed | 1919-06-13 | 1922-08-29 | 0 | Details |
| US1278221A | Railway block system. | Expired / Lapsed | 1915-07-14 | 1918-09-10 | 0 | Details |
| US1002027A | Pneumatic door-operating mechanism. | Expired / Lapsed | 1909-03-12 | 1911-08-29 | 0 | Details |