John E. Spencer
24Patents
11h-index
34Co-inventors
75Inventor score
Filing activity: Nov 13, 1979 → Aug 23, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4723943A | Sheathed syringe | Emerging Cross-Sectional Technologies | 197 | Expired |
| US4673456A | Microwave apparatus for generating plasma afterglows | Electricity | 72 | Expired |
| US6163006A | Permanent magnet ECR plasma source with magnetic field optimization | Electricity | 57 | Expired |
| US8693513B2 | Light generating system and method | Electricity | 28 | Active |
| US5194885A | Methods of, apparatus for, and a camera capable of automatically selecting an optimal angle for bounce illumination | Physics | 23 | Expired |
| US4891087A | Isolation substrate ring for plasma reactor | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4659413A | Automated single slice cassette load lock plasma reactor | Electricity | 21 | Expired |
| US4657620A | Automated single slice powered load lock plasma reactor | Electricity | 19 | Expired |
| US4654106A | Automated plasma reactor | Electricity | 17 | Expired |
| US4360756A | Metal halide lamp containing ThI.sub.4 with added elemental cadmium or zinc | Electricity | 13 | Expired |
| US4657617A | Anodized aluminum substrate for plasma etch reactor | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4623417A | Magnetron plasma reactor | Electricity | 11 | Expired |
| US4776923A | Plasma product treatment apparatus and methods and gas transport systems for use therein | Electricity | 11 | Expired |
| USD606651S1 | Handle portion of a dental syringe | General | 9 | Expired |
| US5560563A | Light shield for closing the film slot of a film cartridge | Physics | 9 | Expired |
| US4657618A | Powered load lock electrode/substrate assembly including robot arm, optimized for plasma process uniformity and rate | Electricity | 9 | Expired |
| US5869802A | Plasma producing structure | Performing Operations; Transporting | 9 | Expired |
| USD618790S1 | Portion of a dental syringe | General | 7 | Expired |
| US4492443A | Camera mechanism | Physics | 6 | Expired |
| US4821058A | Camera with flash responsive focus system | Physics | 2 | Expired |
| US8995481B2 | Light generating system and method | Electricity | 2 | Active |
| US4676620A | Demetering cam for a disk camera | Physics | 1 | Expired |
| US8696136B2 | Rear projection display using laser excited photoluminescence | Physics | 0 | Active |
| US11280884B2 | LIDAR instrument and method for operating a LIDAR instrument | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.