Doherty Research Co
Doherty ReActive Patents
0
Total Holdings
14
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2073247A | Electric flash producing method and apparatus | Expired / Lapsed | 1934-02-05 | 1937-03-09 | 0 | Details |
| US2070182A | Steam generator | Expired / Lapsed | 1935-07-25 | 1937-02-09 | 0 | Details |
| US2065643A | Method and apparatus for treating clays | Expired / Lapsed | 1934-03-17 | 1936-12-29 | 0 | Details |
| US2043484A | Variable frequency stroboscope | Expired / Lapsed | 1934-06-15 | 1936-06-09 | 0 | Details |
| US1981850A | Pipe welding | Expired / Lapsed | 1931-06-01 | 1934-11-27 | 0 | Details |
| US1930745A | Method and means for cold treating metal tubing | Expired / Lapsed | 1930-10-20 | 1933-10-17 | 0 | Details |
| US1904070A | Combustion engine with preheated air | Expired / Lapsed | 1928-02-20 | 1933-04-18 | 0 | Details |
| US1769675A | Fuel injection and atomization by stream impact | Expired / Lapsed | 1927-04-11 | 1930-07-01 | 0 | Details |
| US1761295A | Fluid meter | Expired / Lapsed | 1919-08-29 | 1930-06-03 | 0 | Details |
| US1758828A | Combined burner and regulator unit | Expired / Lapsed | 1924-01-10 | 1930-05-13 | 0 | Details |
| US1725374A | Pilot-controlled demand meter | Expired / Lapsed | 1927-09-10 | 1929-08-20 | 0 | Details |
| US1699676A | Fluid-controlling mechanism | Expired / Lapsed | 1920-11-19 | 1929-01-22 | 0 | Details |
| US1593601A | Fluid-controlling mechanism | Expired / Lapsed | 1921-03-07 | 1926-07-27 | 0 | Details |
| US1379587A | Pump | Expired / Lapsed | 1919-08-16 | 1921-05-24 | 0 | Details |