Ken Matsubara
86Patents
14h-index
84Co-inventors
87Inventor score
Filing activity: Sep 5, 1986 → Jun 23, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5075724A | System for recognizing interchangeable articles | Physics | 45 | Expired |
| US6046936A | Semiconductor, memory card, and data processing system | Physics | 43 | Expired |
| US4887104A | Electrooptical light shutter device and printer apparatus using same | Performing Operations; Transporting | 30 | Expired |
| US7604088B2 | Electric power steering system | Performing Operations; Transporting | 28 | Expired |
| US6333871A | Nonvolatile semiconductor memory including a controller for providing an improved reprogram operation | Physics | 25 | Expired |
| US5671076A | Image display device using vibrating mirror | Physics | 20 | Expired |
| US6992936B2 | Semiconductor, memory card, and data processing system | Physics | 17 | Expired |
| US7581058B2 | Non-volatile memory having multiple erase operations | Physics | 16 | Active |
| US6201559A | Method for measuring the quantity of light emergent from an optical tip array and image forming apparatus provided with an optical tip array | Physics | 15 | Expired |
| US4854678A | Electro-optical light shutter device | Physics | 15 | Expired |
| US7233529B2 | System for erasing nonvolatile memory | Physics | 14 | Expired |
| US4967240A | Recording apparatus | Physics | 14 | Expired |
| US5011271A | Light shutter arrays for forming images | Performing Operations; Transporting | 14 | Expired |
| US6958940B2 | Nonvolatile semiconductor memory device capable of realizing optimized erasing operation in a memory array | Physics | 14 | Expired |
| US7791293B2 | Motor controller and electric power steering system | Electricity | 14 | Active |
| US6892588B2 | Torque sensor | Physics | 13 | Expired |
| US5450230A | Light shutter array with a substantially even distribution transmitted light | Performing Operations; Transporting | 13 | Expired |
| US5206684A | Recording apparatus including a memory into which information is written in a particular order and from which memory information is read in the reverse order | Physics | 12 | Expired |
| US7012836B2 | Nonvolatile memory and method of restoring of failure memory cell | Physics | 11 | Expired |
| US4902111A | Method and device for driving electro-optical light shutter array | Physics | 10 | Expired |
| US5293203A | Image forming apparatus having a movable sheet receiving tray | Physics | 10 | Expired |
| US6507520B2 | Nonvolatile memory system | Physics | 10 | Expired |
| US5166510A | Light printer with photoelectric light quantity control means | Physics | 10 | Expired |
| US5093676A | Method of driving electro-optical light shutter for use in recording apparatus | Physics | 9 | Expired |
| US6278474A | Image forming apparatus provided with a plurality of light signal emitting heads | Electricity | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.