National Machinery Co
National MActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2881297A | Metal working apparatus | Expired / Lapsed | 1957-07-29 | 1959-04-07 | 0 | Details |
| US2689359A | Forging apparatus for making pipe plugs | Expired / Lapsed | 1951-02-23 | 1954-09-21 | 0 | Details |
| US2250629A | Nonrepeat valve | Expired / Lapsed | 1938-12-12 | 1941-07-29 | 0 | Details |
| US2220517A | Clutch control for braking flywheels | Expired / Lapsed | 1938-07-20 | 1940-11-05 | 0 | Details |
| US2210227A | Forging press control | Expired / Lapsed | 1938-09-12 | 1940-08-06 | 0 | Details |
| US2192734A | Control mechanism for forging machines | Expired / Lapsed | 1936-02-18 | 1940-03-05 | 0 | Details |
| US2038543A | Header | Expired / Lapsed | 1934-03-27 | 1936-04-28 | 0 | Details |
| US2030290A | Method and apparatus for making headed blanks and resultant… | Expired / Lapsed | 1933-07-11 | 1936-02-11 | 0 | Details |
| US1981167A | Driving mechanism | Expired / Lapsed | 1932-03-17 | 1934-11-20 | 0 | Details |
| US1944653A | Nut placer for tappers | Expired / Lapsed | 1932-02-23 | 1934-01-23 | 0 | Details |
| US1916608A | Apparatus for handling forgings | Expired / Lapsed | 1929-08-02 | 1933-07-04 | 0 | Details |