Lewis Engineering Co
Lewis EngiActive Patents
0
Total Holdings
14
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3775617A | Servo apparatus with photosensitive device and compensating… | Expired / Lapsed | 1972-08-10 | 1973-11-27 | 10 | Details |
| US2761052A | Electric temperature control | Expired / Lapsed | 1952-12-23 | 1956-08-28 | 0 | Details |
| US2697735A | Temperature-controlled thermocouple cold junction | Expired / Lapsed | 1953-06-01 | 1954-12-21 | 0 | Details |
| US2588014A | Resistance thermometer bulb | Expired / Lapsed | 1949-04-27 | 1952-03-04 | 0 | Details |
| US2504931A | Multiple temperature indicator and overtemperature alarm | Expired / Lapsed | 1948-07-21 | 1950-04-18 | 0 | Details |
| US2476099A | Resistance thermometer bulb | Expired / Lapsed | 1947-02-26 | 1949-07-12 | 0 | Details |
| US2443073A | Temperature compensated electrical bridge circuit | Expired / Lapsed | 1944-03-17 | 1948-06-08 | 0 | Details |
| US2250712A | Means for indicating and/or recording unknown quantities | Expired / Lapsed | 1938-07-09 | 1941-07-29 | 0 | Details |
| US2246884A | Potentiometer | Expired / Lapsed | 1938-09-22 | 1941-06-24 | 0 | Details |
| US2230779A | Pyrometer potentiometer | Expired / Lapsed | 1937-05-26 | 1941-02-04 | 0 | Details |
| US2202207A | Electric switch | Expired / Lapsed | 1937-05-26 | 1940-05-28 | 0 | Details |
| US2090505A | Rotary switch | Expired / Lapsed | 1933-12-04 | 1937-08-17 | 0 | Details |
| US1971313A | Means for indicating and/or recording unknown quantities | Expired / Lapsed | 1933-05-22 | 1934-08-21 | 0 | Details |
| US1910340A | Means for indicating and/or recording unknown quantities | Expired / Lapsed | 1931-02-21 | 1933-05-23 | 0 | Details |