Pratt and Whitney Co Inc
Pratt andActive Patents
0
Total Holdings
20
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3603203A | Pneumatic tool-sensing system for machine tool | Expired / Lapsed | 1970-01-12 | 1971-09-07 | 19 | Details |
| US3555392A | Servo system utilizing pulse frequency proportional control | Expired / Lapsed | 1969-05-05 | 1971-01-12 | 0 | Details |
| US3538315A | Numerical control system | Expired / Lapsed | 1967-04-17 | 1970-11-03 | 0 | Details |
| US3526033A | Machine tool with tool changer | Expired / Lapsed | 1967-09-19 | 1970-09-01 | 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 |
| US2857739A | Control system for turbo-jet engine | Expired / Lapsed | 1951-04-06 | 1958-10-28 | 0 | Details |
| US2840771A | Positioning servomechanism | Expired / Lapsed | 1955-02-09 | 1958-06-24 | 0 | Details |
| US2737168A | Fuel injection apparatus | Expired / Lapsed | 1949-10-22 | 1956-03-06 | 0 | Details |
| US1980336A | Chuck retaining means | Expired / Lapsed | 1933-05-17 | 1934-11-13 | 0 | Details |
| US1664823A | Size indicator for surface grinders | Expired / Lapsed | 1923-02-19 | 1928-04-03 | 0 | Details |
| US1547514A | Thread-testing device | Expired / Lapsed | 1921-11-09 | 1925-07-28 | 0 | Details |
| US1507272A | Internal-expanding gauge | Expired / Lapsed | 1920-07-10 | 1924-09-02 | 0 | Details |
| US1491102A | Method of and machine for making gauges and other articles | Expired / Lapsed | 1919-07-09 | 1924-04-22 | 0 | Details |
| US1487834A | Reversible gauge | Expired / Lapsed | 1922-04-08 | 1924-03-25 | 0 | Details |
| US1486342A | Method of making gauges and other articles | Expired / Lapsed | 1919-07-08 | 1924-03-11 | 0 | Details |
| US1252928A | Lathe. | Expired / Lapsed | 1910-01-03 | 1918-01-08 | 0 | Details |
| US868086A | Adjustable cam. | Expired / Lapsed | 1906-02-28 | 1907-10-15 | 0 | Details |