Sprague Electric Co
Sprague ElActive Patents
0
Total Holdings
41
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3878501A | Asymmetrical dual PTCR package for motor start system | Expired / Lapsed | 1974-01-02 | 1975-04-15 | 4 | Details |
| US3835434A | Ptc resistor package | Expired / Lapsed | 1973-06-04 | 1974-09-10 | 11 | Details |
| US3615873A | Method of stabilizing mos devices | Expired / Lapsed | 1969-06-03 | 1971-10-26 | 4 | Details |
| US3607697A | Sputtering process for making a film of silica and silicon … | Expired / Lapsed | 1968-04-18 | 1971-09-21 | 2 | Details |
| US3604900A | Electronic credit card | Expired / Lapsed | 1969-07-07 | 1971-09-14 | 3 | Details |
| US3568127A | Electrical resistors | Expired / Lapsed | 1968-10-28 | 1971-03-02 | 16 | Details |
| US3548269A | Resistive layer semiconductive device | Expired / Lapsed | 1968-12-03 | 1970-12-15 | 0 | Details |
| US3467828A | A.c. latching circuit for scr having photoresistive latching | Expired / Lapsed | 1966-12-21 | 1969-09-16 | 0 | Details |
| US3390019A | Method of making a semiconductor by ionic bombardment | Expired / Lapsed | 1964-12-24 | 1968-06-25 | 0 | Details |
| US3293587A | Electrical resistor and the like | Expired / Lapsed | 1965-10-20 | 1966-12-20 | 2 | Details |
| US3181097A | Single crystal semiconductor resistors | Expired / Lapsed | 1960-09-19 | 1965-04-27 | 1 | Details |
| US3167451A | Method of resistor production | Expired / Lapsed | 1959-08-26 | 1965-01-26 | 2 | Details |
| US3100813A | Capacitor sealing means | Expired / Lapsed | 1959-01-12 | 1963-08-13 | 2 | Details |
| US3073007A | Method and means for assembling capacitors | Expired / Lapsed | 1958-09-29 | 1963-01-15 | 2 | Details |
| US3029366A | Multiple semiconductor assembly | Expired / Lapsed | 1959-04-22 | 1962-04-10 | 0 | Details |
| US2993998A | Transistor combinations | Expired / Lapsed | 1955-06-09 | 1961-07-25 | 0 | Details |
| US2991371A | Variable capacitor | Expired / Lapsed | 1959-06-15 | 1961-07-04 | 0 | Details |
| US2935668A | Electrical capacitors | Expired / Lapsed | 1956-06-28 | 1960-05-03 | 2 | Details |
| US2929923A | Light modulation device | Expired / Lapsed | 1954-08-19 | 1960-03-22 | 0 | Details |
| US2919213A | Polytetrafluoroethylene suspensions and method of coating w… | Expired / Lapsed | 1956-05-31 | 1959-12-29 | 2 | Details |
| US2897409A | Plating process | Expired / Lapsed | 1954-10-06 | 1959-07-28 | 0 | Details |
| US2883544A | Transistor manufacture | Expired / Lapsed | 1955-12-19 | 1959-04-21 | 0 | Details |
| US2820131A | Curing oven | Expired / Lapsed | 1951-08-01 | 1958-01-14 | 0 | Details |
| US2786925A | Metal film resistor | Expired / Lapsed | 1952-12-31 | 1957-03-26 | 1 | Details |
| US2786088A | Electrochemical systems | Expired / Lapsed | 1952-09-09 | 1957-03-19 | 2 | Details |
| US2779877A | Multiple junction transistor unit | Expired / Lapsed | 1955-06-17 | 1957-01-29 | 0 | Details |
| US2754259A | Process and apparatus for growing single crystals | Expired / Lapsed | 1952-11-29 | 1956-07-10 | 2 | Details |
| US2707703A | Heat stable, insulated, electrical conductors and process f… | Expired / Lapsed | 1947-08-09 | 1955-05-03 | 1 | Details |
| US2694185A | Electrical circuit arrangement | Expired / Lapsed | 1951-01-19 | 1954-11-09 | 0 | Details |
| US2636164A | Fire alarm system | Expired / Lapsed | 1951-04-23 | 1953-04-21 | 0 | Details |
| US2635994A | Production of carbon resistors | Expired / Lapsed | 1950-04-27 | 1953-04-21 | 2 | Details |
| US2628271A | Molded electrolytic capacitor | Expired / Lapsed | 1950-07-11 | 1953-02-10 | 2 | Details |
| US2623096A | Electrical capacitor | Expired / Lapsed | 1949-09-27 | 1952-12-23 | 2 | Details |
| US2574458A | Remote monitoring system | Expired / Lapsed | 1947-06-27 | 1951-11-13 | 0 | Details |
| US2518225A | High-frequency resistor | Expired / Lapsed | 1946-07-03 | 1950-08-08 | 0 | Details |
| US2495630A | Electrically insulated conductor and process for producing … | Expired / Lapsed | 1944-05-20 | 1950-01-24 | 0 | Details |
| US2495199A | Electrical resistor and high-resistance carbon composition … | Expired / Lapsed | 1945-10-19 | 1950-01-17 | 0 | Details |
| US2444880A | Electrical seal | Expired / Lapsed | 1943-12-23 | 1948-07-06 | 0 | Details |
| US2421652A | Electrical conductor | Expired / Lapsed | 1943-08-02 | 1947-06-03 | 0 | Details |
| US2406319A | Insulated electrical conductor | Expired / Lapsed | 1943-11-19 | 1946-08-27 | 0 | Details |
| US2386634A | Flexible electrical insulating layer | Expired / Lapsed | 1940-03-20 | 1945-10-09 | 0 | Details |