Yoshio Yokoyama
23Patents
10h-index
22Co-inventors
75Inventor score
Filing activity: Apr 30, 1976 → Dec 5, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5118023A | Two-stage returning mechanism | Performing Operations; Transporting | 37 | Expired |
| USD306657S | Power driven brush for cleaning carpets, floors or the like | General | 22 | Expired |
| US5004140A | Electrically-operated tacker | Performing Operations; Transporting | 20 | Expired |
| US5806191A | Hedge trimmer | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6360046B1 | Dispersion-shifted optical fiber | Physics | 18 | Expired |
| US5440650A | Image processing system for inspection of overprinted matter | Physics | 16 | Expired |
| US5653030A | Hedge trimmer | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6275638A | Dispersion-shifted fiber | Physics | 10 | Expired |
| US6535679B2 | Optical fiber and method of manufacturing the same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5872871A | Method and device for measuring the position of a pattern | Physics | 10 | Expired |
| USD320727S | Portable electric grinder | General | 9 | Expired |
| US6748769B2 | Method of producing glass particles deposit | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5296942A | Method and apparatus for inspecting lightness on the surface of an object | Physics | 5 | Expired |
| US5783959A | High precision clock signal generator | Physics | 5 | Expired |
| US5901833A | Golf ball conveyor | Human Necessities | 4 | Expired |
| US6519403B1 | Optical fiber and method of making the same | Physics | 4 | Expired |
| US4035399A | Process for the preparation of 1,4-naphthoquinone | Chemistry; Metallurgy | 4 | Expired |
| US6474108B2 | Fiber preform method with a hot drill-in step for a Ge-doped tube and an F-doped rod | Physics | 3 | Expired |
| US6407404B1 | Apparatus for the examining defect of monolithic substrate and method for examining the same | Physics | 2 | Expired |
| US11062458B2 | Appearance inspection device, transformation data generation device, and program | Physics | 1 | Active |
| US6697559B2 | Optical fiber and method of making the same | Physics | 1 | Expired |
| US4981982A | Condensation catalyst and catalytical condensation process for organic carboxylic anhydrides | Performing Operations; Transporting | 1 | Expired |
| US6889529B2 | Method of manufacturing optical fiber preform | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.