Jeffrey Manufacturing Co
Jeffrey MaActive Patents
0
Total Holdings
35
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2848102A | Mold conveyer | Expired / Lapsed | 1955-05-06 | 1958-08-19 | 0 | Details |
| US2667862A | Variable volume hydraulic motor with pressure responsive vo… | Expired / Lapsed | 1952-04-12 | 1954-02-02 | 0 | Details |
| US2644575A | Multirubber tired adjustably spaced conveyer return idler a… | Expired / Lapsed | 1947-04-08 | 1953-07-07 | 0 | Details |
| US2588866A | Hydraulic transmission of the swash plate type pump and mot… | Expired / Lapsed | 1944-09-14 | 1952-03-11 | 0 | Details |
| US2575504A | Hot pin heading machine | Expired / Lapsed | 1949-01-18 | 1951-11-20 | 0 | Details |
| US2554038A | Chain having rollers forming its conveying surface | Expired / Lapsed | 1948-05-12 | 1951-05-22 | 0 | Details |
| US2498405A | Continuous vibrating reaction chamber | Expired / Lapsed | 1946-03-11 | 1950-02-21 | 2 | Details |
| US2483650A | Loading machine | Expired / Lapsed | 1945-08-06 | 1949-10-04 | 0 | Details |
| US2452248A | Electrical mine apparatus | Expired / Lapsed | 1944-05-12 | 1948-10-26 | 0 | Details |
| US2450216A | Electric control circuit | Expired / Lapsed | 1946-05-21 | 1948-09-28 | 0 | Details |
| US2431174A | Mold dumping apparatus | Expired / Lapsed | 1946-03-20 | 1947-11-18 | 0 | Details |
| US2387159A | Mining machine | Expired / Lapsed | 1943-11-04 | 1945-10-16 | 0 | Details |
| US2366415A | Electric control system | Expired / Lapsed | 1942-10-22 | 1945-01-02 | 0 | Details |
| US2357742A | Vehicle | Expired / Lapsed | 1941-08-16 | 1944-09-05 | 0 | Details |
| US2349390A | System for treating sewage | Expired / Lapsed | 1942-05-16 | 1944-05-23 | 0 | Details |
| US2323456A | Ventilator | Expired / Lapsed | 1940-07-12 | 1943-07-06 | 0 | Details |
| US2285863A | Hydraulic piston motor | Expired / Lapsed | 1940-11-04 | 1942-06-09 | 0 | Details |
| US2285434A | Apparatus for operating vibratory conveyers or motors | Expired / Lapsed | 1938-10-22 | 1942-06-09 | 0 | Details |
| US2263779A | Mining machine | Expired / Lapsed | 1938-05-06 | 1941-11-25 | 0 | Details |
| US2250722A | Liquid depth sampling device and method of obtaining samples | Expired / Lapsed | 1939-01-12 | 1941-07-29 | 0 | Details |
| US2191341A | Ventilator | Expired / Lapsed | 1937-02-26 | 1940-02-20 | 0 | Details |
| US2171162A | Mining machine | Expired / Lapsed | 1937-03-17 | 1939-08-29 | 0 | Details |
| US2168663A | Plug type switch | Expired / Lapsed | 1936-04-03 | 1939-08-08 | 0 | Details |
| US2161500A | Process and apparatus for treatment of mineral materials | Expired / Lapsed | 1935-01-02 | 1939-06-06 | 0 | Details |
| US2102618A | Automatic system for supplying pulverized fuel to furnaces | Expired / Lapsed | 1933-01-23 | 1937-12-21 | 0 | Details |
| US2102691A | Automatic system for supplying pulverized fuel to furnaces | Expired / Lapsed | 1933-01-18 | 1937-12-21 | 0 | Details |
| US2058804A | Material handling mechanism | Expired / Lapsed | 1933-03-03 | 1936-10-27 | 0 | Details |
| US2020034A | Sand conditioning apparatus | Expired / Lapsed | 1931-12-31 | 1935-11-05 | 0 | Details |
| US2002951A | Loading machine control mechanism | Expired / Lapsed | 1930-05-08 | 1935-05-28 | 0 | Details |
| US1954051A | Drilling mechanism | Expired / Lapsed | 1932-06-10 | 1934-04-10 | 0 | Details |
| US1720364A | Explosionproof mining apparatus | Expired / Lapsed | 1915-05-06 | 1929-07-09 | 0 | Details |
| US1412868A | Mining machine | Expired / Lapsed | 1916-06-05 | 1922-04-18 | 0 | Details |
| US1358167A | Conveyer | Expired / Lapsed | 1919-04-02 | 1920-11-09 | 0 | Details |
| US1136827A | Fan-blower. | Expired / Lapsed | 1909-06-19 | 1915-04-20 | 0 | Details |
| US908031A | Trolley-switch. | Expired / Lapsed | 1901-01-12 | 1908-12-29 | 0 | Details |