John C. Keith
9Patents
6h-index
18Co-inventors
56Inventor score
Filing activity: Jun 6, 1974 → Oct 11, 1990
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3971925A | Adaptable programmed calculator having provision for plug-in keyboard and memory modules | Physics | 42 | Expired |
| US5293593A | Method and apparatus for the mapping of physically non-contiguous memory fragments to be linearly addressable | Physics | 24 | Expired |
| US4181966A | Adaptable programmed calculator including a percent keyboard operator | Physics | 16 | Expired |
| US4089059A | Programmable calculator employing a read-write memory having a movable boundary between program and data storage sections thereof | Physics | 11 | Expired |
| US4707571A | Ergonomic digitizer stylus | Physics | 9 | Expired |
| US4697048A | Graphics tablet menu locator accommodating differing sizes of paper | Physics | 7 | Expired |
| US4156921A | Adaptable programmed calculator including automatic decimal point positioning | Physics | 4 | Expired |
| US4566072A | Programmable calculator including means for digitizing the position of an X-Y plotter pen | Physics | 3 | Expired |
| US4330839A | Programmable calculator including means for automatically processing imformation stored on a magnetic record member | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.