GTE Sylvania Limited
600Patents
0Active
600Granted
44Portfolio score
Filing activity: Feb 6, 1970 → Feb 23, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4090216A | Ambient light contrast and color control circuit | Electricity | 250 | Expired |
| US4047180A | Broadband corrugated horn antenna with radome | Electricity | 195 | Expired |
| US4006546A | Back-lighted display arrangement | Physics | 137 | Expired |
| US4131657A | Electric automotive choke | Mechanical Engineering; Lighting; Heating | 75 | Expired |
| US4017347A | Method for producing ceramic cellular structure having high cell density | Emerging Cross-Sectional Technologies | 70 | Expired |
| US4009815A | Apparatus for maintaining vertically moving strip at established tension | Performing Operations; Transporting | 64 | Expired |
| US3974245A | Process for producing free flowing powder and product | Chemistry; Metallurgy | 63 | Expired |
| US4109307A | High power factor conversion circuitry | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4219870A | Front loading projection unit | Mechanical Engineering; Lighting; Heating | 61 | Expired |
| US4393505A | Gas discharge laser having a buffer gas of neon | Electricity | 58 | Expired |
| US4080027A | Electrical contact and connector | Electricity | 57 | Expired |
| US4074201A | Signal analyzer with noise estimation and signal to noise readout | Physics | 54 | Expired |
| US4100415A | Modular photochemotherapy chamber | Human Necessities | 53 | Expired |
| US4127795A | Lamp ballast circuit | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4116516A | Multiple layered connector | Electricity | 50 | Expired |
| US4121192A | System and method for determining position and velocity of an intruder from an array of sensors | Physics | 47 | Expired |
| US4065413A | Fire resistance wood-based boards, process for producing same and compositions useful therefor | Emerging Cross-Sectional Technologies | 46 | Expired |
| US3974389A | Terbium-activated rare earth oxysulfide X-ray phosphors | Physics | 43 | Expired |
| US4073845A | High density high strength S13 N4 ceramics prepared by pressureless sintering of partly crystalline, partly amorphous S13 N4 powder | Chemistry; Metallurgy | 43 | Expired |
| US4075476A | Sinusoidal wave oscillator ballast circuit | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4025462A | Ceramic cellular structure having high cell density and catalyst layer | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4002849A | Scanning apparatus for detecting and analyzing supervisory and signaling information | Electricity | 40 | Expired |
| US4180751A | Mode-locked optical parametric oscillator apparatus | Electricity | 40 | Expired |
| US3981340A | Cover | Human Necessities | 37 | Expired |
| US4045711A | Tuned oscillator ballast circuit | Emerging Cross-Sectional Technologies | 37 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.