Hiroshi Nakayama
211Patents
21h-index
294Co-inventors
93Inventor score
Filing activity: Mar 27, 1974 → Jan 23, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5539798A | X-ray radiographic apparatus | Electricity | 59 | Expired |
| US5031225A | Character recognition method for recognizing character in an arbitrary rotation position | Physics | 56 | Expired |
| US8124903B2 | Input device and manufacturing method thereof | Emerging Cross-Sectional Technologies | 54 | Active |
| US6206535A | Planar lighting device and method of making light guides used therein | Physics | 50 | Expired |
| US4786891A | Absolute encoder for linear or angular position measurements | Electricity | 43 | Expired |
| US4872024A | Print inspection method, print inspection apparatus and automatic print sorting system | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4961231A | Pattern recognition method | Physics | 39 | Expired |
| US6685471B1 | Tooth brushing device with video scope | Human Necessities | 35 | Expired |
| US4935312A | Film carrier having tin and indium plated layers | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6515872B2 | Automobile and electric power system controller thereof | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5680471A | Image processing apparatus and method | Physics | 27 | Expired |
| US5342257A | Planetary gear transmission | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US6555312B1 | Method for detecting bacteria with bacteriaphage | Physics | 26 | Expired |
| US5230891A | Modified protease, method of producing the same and cosmetic products containing the modified protease | Human Necessities | 26 | Expired |
| US4821805A | Automatic fire extinguishing system | Human Necessities | 25 | Expired |
| US5196527A | Porous ion-exchanged fine cellulose particles, method for production thereof, and affinity carrier | Performing Operations; Transporting | 24 | Expired |
| US5376840A | Substrate bias voltage generator having current ability based on external and internal power voltages | Electricity | 24 | Expired |
| US5004520A | Method of manufacturing film carrier | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5841271A | Test mode power circuit for integrated-circuit chip | Electricity | 22 | Expired |
| US5802532A | Kerning method and electronic typographic/editing apparatus | Physics | 22 | Expired |
| US6496665B2 | Image forming apparatus and fixing device | Physics | 21 | Expired |
| US5133968A | Modified protease, method of producing the same and cosmetic products containing the modified protease | Human Necessities | 21 | Expired |
| US6321046A | Induction heating fixing device having a central processing unit, and image forming apparatus using the fixing device | Electricity | 20 | Expired |
| US7470149B2 | Conductive-contact holder and conductive-contact unit | Physics | 20 | Expired |
| US4275614A | Apparatus for preventing wrong shift operation in speed change gear for vehicle | Emerging Cross-Sectional Technologies | 20 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.