Pennsylvania Railroad Co
PennsylvanActive Patents
0
Total Holdings
8
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2400400A | Towing system for aircraft | Expired / Lapsed | 1942-12-14 | 1946-05-14 | 0 | Details |
| US2398624A | Light transmitting element | Expired / Lapsed | 1943-12-17 | 1946-04-16 | 0 | Details |
| US2282929A | Rail marking device | Expired / Lapsed | 1940-11-09 | 1942-05-12 | 0 | Details |
| US2218784A | Rail flaw detecting method and apparatus | Expired / Lapsed | 1937-06-04 | 1940-10-22 | 0 | Details |
| US2181436A | Thermostatically controlled heating system for railway cars | Expired / Lapsed | 1937-06-19 | 1939-11-28 | 0 | Details |
| US2087667A | Computer | Expired / Lapsed | 1934-01-10 | 1937-07-20 | 0 | Details |
| US2067144A | Fresh air intake for railway cars | Expired / Lapsed | 1935-09-05 | 1937-01-05 | 0 | Details |
| US1895649A | Lifting grab | Expired / Lapsed | 1932-08-12 | 1933-01-31 | 0 | Details |