Pratt and Whitney Co Inc
Pratt andActive Patents
0
Total Holdings
7
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3555392A | Servo system utilizing pulse frequency proportional control | Expired / Lapsed | 1969-05-05 | 1971-01-12 | 0 | Details |
| US3417303A | Numerical control system | Expired / Lapsed | 1964-03-04 | 1968-12-17 | 0 | Details |
| US3414787A | Numeric control and servo system | Expired / Lapsed | 1964-03-04 | 1968-12-03 | 0 | Details |
| US3253153A | Photosensitive measuring system which converts a physical t… | Expired / Lapsed | 1963-01-16 | 1966-05-24 | 2 | Details |
| US3068386A | Numerical control positioning servosystem | Expired / Lapsed | 1960-04-08 | 1962-12-11 | 0 | Details |
| US2840771A | Positioning servomechanism | Expired / Lapsed | 1955-02-09 | 1958-06-24 | 0 | Details |
| US1664823A | Size indicator for surface grinders | Expired / Lapsed | 1923-02-19 | 1928-04-03 | 0 | Details |