Hiroshi Sugai
22Patents
9h-index
49Co-inventors
75Inventor score
Filing activity: Mar 8, 1978 → May 19, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5821614A | Card type semiconductor device | Emerging Cross-Sectional Technologies | 96 | Expired |
| US4748359A | Permanent magnet rotor with sinusoidal flux pattern | Electricity | 42 | Expired |
| US4955817A | Construction for removing electronic charges in connectors | Electricity | 41 | Expired |
| US4788482A | Position correcting control system for servomechanism device | Physics | 20 | Expired |
| US5019773A | Method and apparatus for detecting positions and/or speed of a moving body using two phase signals | Physics | 17 | Expired |
| US4218216A | Method of lubricating dental hand-piece and small-sized oiler for use therein | Human Necessities | 15 | Expired |
| US4516065A | Control apparatus for AC motors | Electricity | 12 | Expired |
| US4922175A | Position/speed detection method and apparatus | Physics | 11 | Expired |
| US4326846A | Dental handpiece | Human Necessities | 9 | Expired |
| US4209293A | Air bearing for a dental handpiece | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4808933A | Rotating speed measuring apparatus having a corrector for low and high speeds using angle and frequency transducers | Physics | 7 | Expired |
| US4642203A | Method of treating low-level radioactive waste | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5200678A | Motor driving control apparatus | Physics | 4 | Expired |
| US4863754A | Moist pellet feed for breeding fish | Human Necessities | 4 | Expired |
| US6397775B1 | Deposited film forming system and process | Electricity | 4 | Expired |
| US4733070A | Rotational information output device | Physics | 3 | Expired |
| US4891163A | Method of processing nuclear fuel scraps | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8167972B2 | Process for producing metal nanoparticle and metal nanoparticle produced by the process | Emerging Cross-Sectional Technologies | 2 | Active |
| US4189836A | Chuck for dental hand-piece | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7632704B2 | Manufacturing method for organic electronic element and manufacturing apparatus therefor | Electricity | 0 | Expired |
| US6926934B2 | Method and apparatus for deposited film | Electricity | 0 | Expired |
| US8221553B2 | Method for producing organic light-emitting device | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.