Katsumi Yamaguchi
48Patents
12h-index
65Co-inventors
84Inventor score
Filing activity: Apr 9, 1981 → Sep 17, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5786594A | Multi-beam pitch adjustment system and method | Electricity | 76 | Expired |
| US5005928A | Optical scanning system | Physics | 45 | Expired |
| US6206358A | Book binding system | Performing Operations; Transporting | 38 | Expired |
| US5432537A | Optical recording apparatus capable of controlling optical power of laser diode array | Performing Operations; Transporting | 34 | Expired |
| US4934772A | Light beam scanning lens and light beam scanning device | Physics | 30 | Expired |
| US5671077A | Multi-beam light source device and optical scanning apparatus using the multi-beam source device | Performing Operations; Transporting | 25 | Expired |
| US6269999A | Semiconductor chip mounting method utilizing ultrasonic vibrations | Electricity | 24 | Expired |
| US4953171A | Semiconductor laser source unit | Electricity | 21 | Expired |
| US4955682A | Scanning optical system | Physics | 16 | Expired |
| US7485680B2 | Process for producing rubbery polymer particle and process for producing resin composition containing the same | Chemistry; Metallurgy | 16 | Expired |
| US8222324B2 | Process for producing modified epoxy resin | Electricity | 13 | Active |
| US5155616A | Scanning optical system | Physics | 12 | Expired |
| US6133566A | Multiple beam scanning apparatus and light source unit therefor | Physics | 12 | Expired |
| US6726508B2 | Card connector | Physics | 10 | Expired |
| US4906061A | Collimated light beam scanning method including curvature of field correction | Physics | 10 | Expired |
| US5233455A | Scanning optical system | Physics | 10 | Expired |
| US4423445A | Clutch system in a tape player | Physics | 9 | Expired |
| US4403265A | Power loading/unloading mechanism for tape record/playback apparatus | Physics | 9 | Expired |
| US6337455B1 | Process and apparatus for transforming metal material | Electricity | 9 | Expired |
| US4708302A | Mode switching over gear mechanism for reel | Physics | 9 | Expired |
| US4479155A | Auto-loading mechanism in a magnetic recording/reproducing apparatus | Physics | 8 | Expired |
| US4835636A | Dustproof door mechanism | Physics | 8 | Expired |
| US4825312A | Cassette loading mechanism | Physics | 7 | Expired |
| US8680180B2 | Process for producing modified epoxy resin | Electricity | 6 | Active |
| US4511940A | Tape player having motor-driven tape-pack loading mechanism | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.