Robert L. Protheroe
24Patents
16h-index
14Co-inventors
74Inventor score
Filing activity: Dec 9, 1985 → Nov 20, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5587560A | Portable handwritten data capture device and method of using | Physics | 153 | Expired |
| US5216595A | System and method for integration of lottery terminals into point of sale systems | Physics | 143 | Expired |
| US5195133A | Apparatus and method for producing a digitized transaction record including an encrypted signature | Physics | 131 | Expired |
| US6539363B1 | Write input credit transaction apparatus and method with paperless merchant credit card processing | Physics | 108 | Expired |
| US5297202A | Apparatus and method for producing a digitized transaction record including an encrypted signature | Physics | 108 | Expired |
| US7436957B1 | Audio cassette emulator with cryptographic media distribution control | Physics | 104 | Expired |
| US4682150A | Data compression method and apparatus | Physics | 89 | Expired |
| US5949348A | Method and apparatus for variable keyboard display | Physics | 76 | Expired |
| US5285506A | Method of recording a handwritten message | Physics | 38 | Expired |
| US5120906A | Handwriting capture device | Physics | 35 | Expired |
| US5539159A | Handwriting capture device | Physics | 31 | Expired |
| US5191175A | Self-tuning digitizer control circuit and method | Physics | 25 | Expired |
| US5115107A | Method of correcting skew between a digitizer and a digital display | Physics | 23 | Expired |
| US5335230A | Apparatus and method for automatic digitizer fault detection | Physics | 23 | Expired |
| US5563381A | Handwriting capture system with segmented digitizer | Physics | 18 | Expired |
| US5414441A | Temperature compensation apparatus for liquid crystal display | Physics | 17 | Expired |
| US5225636A | Apparatus and method for digitizer point sampling and validation | Physics | 15 | Expired |
| US5245139A | Apparatus and method for digitizer sampled point validation | Physics | 14 | Expired |
| US5227590A | Handwriting capture device | Physics | 13 | Expired |
| US5322978A | Handwriting capture device with integral forms printer | Physics | 13 | Expired |
| US5380958A | Handwriting capture device | Physics | 10 | Expired |
| US5412161A | Handwriting capture system with segmented digitizer | Physics | 9 | Expired |
| US5140107A | Digitizer screen and method of making | Physics | 5 | Expired |
| US7672900B2 | Write input transaction apparatus and method | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.