David E. Lewis
50Patents
14h-index
36Co-inventors
84Inventor score
Filing activity: Nov 15, 1972 → Feb 8, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4224644A | Method and apparatus for controlling a tape player/recorder for retrieving and playing prerecorded information | Physics | 124 | Expired |
| US5729511A | Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal | Electricity | 83 | Expired |
| US6122232A | Isolation apparatus for use in disc drive system to mitigate effects of undesired mechanical forces and disc drive system including same | Electricity | 71 | Expired |
| US3986498A | Remote ECG monitoring system | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5235045A | Non-azo naphthalimide dyes | Chemistry; Metallurgy | 42 | Expired |
| US5420136A | Eradication of pathogenic biological contaminants using non-azo naphthalimide dyes | Chemistry; Metallurgy | 31 | Expired |
| US5878015A | Laser driver for controlling electrical current passed to a laser in an optical disc system | Electricity | 27 | Expired |
| US5917045A | Dimeric non-azo naphthalimides and uses for same | Chemistry; Metallurgy | 27 | Expired |
| US5565551A | Non-azo naphthalimide dyes and uses for same | Chemistry; Metallurgy | 24 | Expired |
| US4779253A | Sampled servo for an optical disk drive | Physics | 24 | Expired |
| US6434087B1 | Optical disc system and method for controlling bias coil and light source to process information on a storage medium | Physics | 18 | Expired |
| US6069857A | Optical disc system having improved circuitry for performing blank sector check on readable disc | Physics | 16 | Expired |
| US6278665A | Optical disc system including current monitoring circuit assembly having controller with improved optics module and laser driver and method for operating same | Electricity | 14 | Expired |
| US4456548A | Composition and method for making conductive polymers | Chemistry; Metallurgy | 14 | Expired |
| US5766600A | Non-azo naphtalimide dyes and uses for same | Human Necessities | 14 | Expired |
| US6266306A | Analog to digital converter and assembly for use in optical drive system to normalize servo error signals and multiplex reference voltage inputs and digital outputs | Electricity | 14 | Expired |
| US3935534A | Converter-tuner for information transmission system | Electricity | 14 | Expired |
| US5796703A | Apparatus for controlling an electrical current passed to a writing device in an optical storage system | Electricity | 13 | Expired |
| US6881424B1 | Highly acidic metalated organic acid | Human Necessities | 13 | Expired |
| US6410505B1 | Dimeric non-azo naphthalimides and uses for the same | Chemistry; Metallurgy | 12 | Expired |
| US5308773A | Non-azo 1,8-naphthalimide dyes for the detection and quantitation of a paramagnetic metal cation in a non-aqueous medium | Physics | 12 | Expired |
| US6236625A | Optical disc system having current monitoring circuit with controller for laser driver and method for operating same | Physics | 11 | Expired |
| US6418097B1 | Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same | Electricity | 11 | Expired |
| US6572908B2 | Highly acidic metalated organic acid as a food additive | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4914645A | Optical disk tracking and seeking systems and specific track formats using servo areas | Physics | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.