Toru Oka
45Patents
11h-index
37Co-inventors
75Inventor score
Filing activity: Feb 21, 1995 → Apr 29, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5649536A | Blood pressure measuring apparatus | Human Necessities | 62 | Expired |
| US5880475A | Scintillation fiber type radiation detector | Physics | 60 | Expired |
| US7393327B2 | Blood pressure monitoring apparatus | Human Necessities | 31 | Active |
| US6972834B1 | Optical distance sensor | Physics | 30 | Expired |
| US7390300B2 | Blood pressure measuring apparatus | Human Necessities | 30 | Active |
| US5780856A | Radiation detector and method of detecting radiation | Physics | 21 | Expired |
| US5675151A | Distribution type detector using scintillation fibers | Physics | 21 | Expired |
| US7566307B2 | Blood pressure monitoring apparatus | Human Necessities | 19 | Active |
| US7034282B2 | Optical rotary encoder | Physics | 19 | Expired |
| US6045510A | Blood pressure measuring apparatus | Human Necessities | 17 | Expired |
| US6413224B1 | Blood pressure measuring apparatus | Human Necessities | 14 | Expired |
| US5836888A | Blood pressure measuring apparatus | Human Necessities | 9 | Expired |
| US6054938A | Optical encoder | Physics | 9 | Expired |
| US9508822B2 | Semiconductor device | Electricity | 9 | Active |
| US7470892B2 | Optical encoder | Physics | 7 | Expired |
| US6972402B2 | Photoelectric rotary encoder | Physics | 5 | Expired |
| US6846116B2 | Sensor head | Physics | 5 | Expired |
| US7405392B2 | Optical rotary encoder | Physics | 5 | Expired |
| US7589314B2 | Optical encoder applying substantially parallel light beams and three periodic optical elements | Physics | 4 | Expired |
| US8987077B2 | Group III nitride semiconductor device, production method therefor, and power converter | Electricity | 4 | Active |
| US7285769B2 | Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces | Physics | 3 | Expired |
| US8633519B2 | Group III nitride semiconductor device, production method therefor, power converter | Electricity | 3 | Active |
| US6956200B2 | Phase-shift photoelectric encoder | Electricity | 3 | Expired |
| US6650401B2 | Optical distance sensor | Physics | 3 | Expired |
| US9349856B2 | Semiconductor device including first interface and second interface as an upper surface of a convex protruded from first interface and manufacturing device thereof | Electricity | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.