Isao Yamamoto
104Patents
16h-index
102Co-inventors
89Inventor score
Filing activity: Apr 7, 1980 → Aug 18, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7560915B2 | Power supply apparatus provided with regulation function and boosting of a regulated voltage | Electricity | 172 | Expired |
| US5158323A | Airbag restraint system for motor vehicle | Performing Operations; Transporting | 69 | Expired |
| US5464458A | System for purifying exhaust gas | Emerging Cross-Sectional Technologies | 65 | Expired |
| US6822403B2 | Light emitting element drive device and electronic device having light emitting element | Electricity | 43 | Expired |
| US8779995B2 | High-frequency waveguide and phase shifter using same, radiator, electronic device which uses this phase shifter and radiator, antenna device, and electronic device equipped with same | Physics | 35 | Active |
| US4324177A | Calender roll for supercalender | Performing Operations; Transporting | 30 | Expired |
| US4846643A | Apparatus for making cotton candy | Human Necessities | 28 | Expired |
| US6628890B1 | Digital recording/reproduction apparatus | Electricity | 24 | Expired |
| US7304871B2 | Boost circuit capable of step-up ratio control | Electricity | 23 | Expired |
| US4466164A | Supercalendering apparatus | Performing Operations; Transporting | 23 | Expired |
| US5127487A | System and method for automatically controlling a vehicle speed to a desired cruise speed with a release function | Performing Operations; Transporting | 23 | Expired |
| US5107948A | Running state control system for motor vehicle | Performing Operations; Transporting | 22 | Expired |
| US7253596B2 | Power supply apparatus capable of supplying a stable converted voltage | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5058698A | Cruise control system for automotive vehicle | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US7391406B2 | Light emission control circuit uniformly and non-uniformly controlling a plurality of light-emitting elements | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6949892B2 | Light emitting element drive device and electronic device light emitting element | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5610555A | Low-voltage driven, audio signal amplifying apparatus and a portable acoustic system using said apparatus | Electricity | 15 | Expired |
| US7315095B2 | Voltage regulating apparatus supplying a drive voltage to a plurality of loads | Electricity | 15 | Expired |
| US7754960B2 | Electronic equipment synchronously controlling light emission from light emitting devices and audio control | Human Necessities | 14 | Active |
| US4866682A | Transducer device | Electricity | 13 | Expired |
| US5012419A | System and method for automatically controlling vehicle speed to desired cruise speed | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6130571A | Semiconductor device with fine-adjustable resistance | Electricity | 12 | Expired |
| US7307385B2 | Boost controller capable of step-up ratio control | Electricity | 12 | Expired |
| US5898814A | Anti-skid stair covering with illuminating areas therein | Fixed Constructions | 10 | Expired |
| US7812580B2 | Power supply apparatus having switchable switching regulator and linear regulator | Emerging Cross-Sectional Technologies | 10 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.