John B. Keys
9Patents
5h-index
9Co-inventors
52Inventor score
Filing activity: Jun 29, 1987 → Dec 21, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5603270A | Quilting material handling and feeding method and apparatus | Textiles; Paper | 24 | Expired |
| US4884234A | Dynamic RAM refresh circuit with DMA access | Physics | 15 | Expired |
| US6394351B1 | Methods and apparatus for enhanced scanner operation employing bar code and bar code fragment time and position of data collection | Physics | 15 | Expired |
| US7931194B2 | Methods and apparatus for automated document examination for age verification | Physics | 15 | Active |
| US6454169B1 | Methods and apparatus for obtaining and maintaining position information for a rotating optical element in a bar code scanner | Physics | 9 | Expired |
| US6651889B2 | Methods and apparatus for obtaining and maintaining position information for a rotating optical element in a bar code scanner | Physics | 5 | Expired |
| US4797932A | Speaker volume control apparatus and method | Physics | 5 | Expired |
| US6695211B2 | Methods and apparatus for enhanced scanner operation employing bar code and bar code fragment time and position of data collection | Physics | 5 | Expired |
| US6796503B1 | Methods and apparatus for dynamic adjustment of bar code reader parameters | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.