John B. Hughes
44Patents
17h-index
10Co-inventors
78Inventor score
Filing activity: Jan 21, 1980 → May 14, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5113129A | Apparatus for processing sample analog electrical signals | Physics | 115 | Expired |
| US5039878A | Temperature sensing circuit | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5689205A | Switched current differentiator | Physics | 37 | Expired |
| US4439692A | Feedback-controlled substrate bias generator | Physics | 35 | Expired |
| US4785253A | Integrated electric filter with adjustable RC parameters | Electricity | 32 | Expired |
| US4897596A | Circuit arrangement for processing sampled analogue electrical signals | Physics | 31 | Expired |
| US5021692A | Integrator circuit | Physics | 31 | Expired |
| US4987379A | Operational amplifier circuit | Electricity | 27 | Expired |
| US5063342A | Temperature threshold sensing circuit | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4791379A | Electrical filter with adjustable RC product | Electricity | 25 | Expired |
| US4958123A | Circuit arrangement for processing sampled analogue electrical signals | Physics | 25 | Expired |
| US5179301A | Switched current differentiator circuit for differentiating an input signal in the form of a sampled analog current | Physics | 24 | Expired |
| US5055719A | Current conveyor circuit | Electricity | 23 | Expired |
| US7002505B2 | Switched-current analogue-to-digital converter | Electricity | 20 | Expired |
| US5711704A | Coin storage and dispensing apparatus | Physics | 20 | Expired |
| US6313780A | Analogue to digital converter | Electricity | 20 | Expired |
| US4733205A | Electrical filter | Electricity | 19 | Expired |
| US5012133A | Circuit arrangement for processing sampled analog electrical signals | Physics | 16 | Expired |
| US5400273A | Analog current memory | Physics | 16 | Expired |
| US5349245A | Signal processing arrangements | Physics | 14 | Expired |
| US5109169A | Integrator circuit | Physics | 13 | Expired |
| US4849759A | Analogue to digital converter | Electricity | 13 | Expired |
| US5369406A | Multiplying digital-to-analogue converter | Electricity | 11 | Expired |
| US5666303A | Current memory | Physics | 11 | Expired |
| US5028822A | Circuit arrangement for processing analogue electrical signals | Physics | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.