William T. Plummer
85Patents
24h-index
60Co-inventors
91Inventor score
Filing activity: Dec 4, 1974 → Jul 7, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4647975A | Exposure control system for an electronic imaging camera having increased dynamic range | Electricity | 150 | Expired |
| US6283374A | Symbology imaging and reading apparatus and method | Physics | 97 | Expired |
| US4681451A | Optical proximity imaging method and apparatus | Physics | 90 | Expired |
| US4786964A | Electronic color imaging apparatus with prismatic color filter periodically interposed in front of an array of primary color filters | Electricity | 89 | Expired |
| US6066857A | Variable focus optical system | Physics | 84 | Expired |
| US4416514A | Color filter | Physics | 81 | Expired |
| US4650292A | Analytic function optical component | Physics | 73 | Expired |
| US5327291A | Compact objective lens | Physics | 71 | Expired |
| US5260828A | Methods and means for reducing temperature-induced variations in lenses and lens devices | Physics | 61 | Expired |
| US6643390B1 | Compact fingerprint identification device | Physics | 51 | Expired |
| US4264167A | Adapter for coupling a camera with a viewing device | Physics | 50 | Expired |
| US4816939A | Magnetic recording media and servo systems using light-transmitting optical gratings | Physics | 48 | Expired |
| US4689696A | Hybrid image recording and reproduction system | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4293892A | Zoom light apparatus | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US4989959A | Anti-aliasing optical system with pyramidal transparent structure | Physics | 35 | Expired |
| US4675531A | Optical scanner having a multi-surfaced lens arrangement for producing a rotationally symmetric beam | Physics | 33 | Expired |
| US5028110A | Fiber optical component | Physics | 32 | Expired |
| US4157216A | Adapter for optically coupling a photographic camera with a viewing device | Physics | 29 | Expired |
| US4759596A | Wavelength selective optical cavity including holographic filter layers | Physics | 28 | Expired |
| US5176972A | Imaging medium with low refractive index layer | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4531702A | Injection mold for forming optical fiber connector | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4687926A | Spectrally filtered lens producing plural f-numbers with different spectral characteristics | Physics | 27 | Expired |
| US4272186A | Camera method and apparatus for recording with selected contrast | Physics | 25 | Expired |
| US4925267A | Structure and fabrication of components for connecting optical fibers | Physics | 25 | Expired |
| US4356538A | Photographic lighting apparatus | Physics | 21 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.