Toru Kumagai
14Patents
8h-index
29Co-inventors
72Inventor score
Filing activity: Apr 8, 1986 → Feb 9, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6377145B1 | Vibration actuator having magnetic circuit elastically supported by a spiral damper with increased compliance | Electricity | 43 | Expired |
| US4706108A | Automatic setup system for controlling color gain, hue and white balance of TV monitor | Electricity | 41 | Expired |
| US5706811A | Method and apparatus for setting reference point for organic measurement | Human Necessities | 26 | Expired |
| US5938598A | Magnetic field source movable phantom head | Physics | 20 | Expired |
| US6628798B2 | Vibration actuator having three vibration modes | Electricity | 14 | Expired |
| US5572384A | Magnetic disk drive device having lead wire holding structure | Electricity | 12 | Expired |
| US5572078A | Spindle motor | Electricity | 9 | Expired |
| US6552456B2 | Hydraulic dynamic pressure bearing motor | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US8276796B2 | Device and method for cutting off substrate of fragile material | Emerging Cross-Sectional Technologies | 5 | Active |
| US10077081B2 | Vehicle roof structure and method for manufacturing vehicle roof structure | Performing Operations; Transporting | 2 | Active |
| US7191806B2 | Oil injecting apparatus | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US5633769A | Magnetic disc drive device | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US6575633B2 | Hydraulic bearing motor | Electricity | 1 | Expired |
| US12319818B2 | Charge-adjustment powder having excellent ability to maintain applied charge, and method of manufacturing the same | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.