JOHN M HOPWOOD
JOHN M HOPActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2357318A | Pressure-actuated valve and vibration damping means therefor | Expired / Lapsed | 1940-06-10 | 1944-09-05 | 0 | Details |
| US2349329A | Control system | Expired / Lapsed | 1942-06-22 | 1944-05-23 | 0 | Details |
| US2339024A | Pneumatic power cylinder and means for preventing over-trav… | Expired / Lapsed | 1943-05-26 | 1944-01-11 | 0 | Details |
| US2304783A | Pressure responsive ratio relay | Expired / Lapsed | 1940-06-10 | 1942-12-15 | 0 | Details |
| US2304782A | Pressure-responsive device | Expired / Lapsed | 1940-06-10 | 1942-12-15 | 0 | Details |
| US2100460A | Electric gauge and method for controlling the current outpu… | Expired / Lapsed | 1935-01-14 | 1937-11-30 | 0 | Details |
| US2016824A | Control system and relay device therefor | Expired / Lapsed | 1933-03-28 | 1935-10-08 | 0 | Details |
| US1989829A | Control system | Expired / Lapsed | 1932-09-21 | 1935-02-05 | 0 | Details |
| US1961343A | Control system for furnaces | Expired / Lapsed | 1933-07-12 | 1934-06-05 | 0 | Details |
| US1958644A | Method of and apparatus for reducing fluid pressures | Expired / Lapsed | 1930-12-11 | 1934-05-15 | 0 | Details |
| US1747314A | Separator | Expired / Lapsed | 1927-02-09 | 1930-02-18 | 0 | Details |