Todd J. Christopher
53Patents
19h-index
27Co-inventors
84Inventor score
Filing activity: Oct 2, 1978 → Dec 15, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5351087A | Two stage interpolation system | Electricity | 130 | Expired |
| US4419699A | Digital on video recording and playback system | Physics | 124 | Expired |
| US4821226A | Dual port video memory system having a bit-serial address input port | Physics | 123 | Expired |
| US4819252A | Sampled data subsampling apparatus | Electricity | 110 | Expired |
| US5689301A | Method and apparatus for identifying video fields produced by film sources | Electricity | 59 | Expired |
| US5563651A | Method and apparatus for identifying video fields produced by film sources employing 2-2 and 3-2 pull down sequences | Electricity | 47 | Expired |
| US5422680A | Non-linear contrast control apparatus with pixel distribution measurement for video display system | Electricity | 46 | Expired |
| US4656515A | Horizontal compression of pixels in a reduced-size video image utilizing cooperating subsampling and display rates | Electricity | 25 | Expired |
| US4901077A | Sigma-delta modulator for D-to-A converter | Electricity | 24 | Expired |
| US5130798A | Dual band progressive television system with noise reduction | Electricity | 24 | Expired |
| US4638360A | Timing correction for a picture-in-picture television system | Electricity | 23 | Expired |
| US4731851A | Digital signal gain control circuitry for varying digital signals in substantially equal db steps | Electricity | 22 | Expired |
| US4309721A | Error coding for video disc system | Physics | 22 | Expired |
| US4823302A | Block oriented random access memory able to perform a data read, a data write and a data refresh operation in one block-access time | Physics | 22 | Expired |
| US4652908A | Filtering system for processing a reduced-resolution video image | Electricity | 22 | Expired |
| US4694414A | Digital delay interpolation filter with amplitude and phase compensation | Electricity | 21 | Expired |
| US4494052A | DC Motor servo system | Electricity | 20 | Expired |
| US4203134A | FM Signal demodulator with defect detection | Electricity | 19 | Expired |
| US6900845B1 | Memory architecture for a multiple format video signal processor | Electricity | 19 | Expired |
| US5084700A | Signal clamp circuitry for analog-to-digital converters | Electricity | 18 | Expired |
| US4286290A | Fast recovery squelch circuit for a video disc player | Physics | 18 | Expired |
| US5119195A | Video noise reduction system employing plural frequency bands | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4757467A | Apparatus for estimating the square root of digital samples | Physics | 15 | Expired |
| US5043813A | Display locked timing signals for video processing | Electricity | 14 | Expired |
| US4656516A | Vertical subsampling and memory synchronization system for a picture within a picture television receiver | Electricity | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.