Hiroshi Usami
8Patents
4h-index
21Co-inventors
57Inventor score
Filing activity: Aug 21, 1986 → Jun 24, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6879845B2 | Wireless communication method and system using beam direction-variable antenna | Electricity | 23 | Expired |
| US5372545A | Ventilator with a sensor | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US6442146B1 | Time-division multiple-access communication system | Electricity | 13 | Expired |
| US4777543A | Tracking correction for a rotary head by detection of the minimum signal level | Physics | 8 | Expired |
| US4933925A | Optical tracking control apparatus for controlling a tracking of a light beam which scans an information recording disc using pre-formatted guide tracks having an interrupted signal format | Physics | 4 | Expired |
| US6157508A | Magnetic recording/playback apparatus | Physics | 1 | Expired |
| US11935338B2 | Automotive electronic control unit | Physics | 0 | Active |
| US10981524B2 | Electronic control unit | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.