Yoichi Ishikawa
23Patents
6h-index
39Co-inventors
69Inventor score
Filing activity: Jul 21, 1980 → Feb 5, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6777881B2 | Power supply apparatus for generating plasma | Electricity | 15 | Expired |
| US4902962A | Detection of the surface of a liquid or foam including moisture inhibiting | Physics | 14 | Expired |
| US7028997B2 | Vibration damping tool | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4579631A | Measurement of oxygen concentration | Emerging Cross-Sectional Technologies | 9 | Expired |
| USD806330S1 | Backpack blower | General | 7 | Active |
| US7143144B2 | System, method and computer readable medium for certifying release of electronic information on an internet | Physics | 7 | Expired |
| US6992840B2 | Photographing lens | Physics | 6 | Expired |
| US5794258A | System for transmitting figure data within a retrievable range according to the date and time of update | Physics | 5 | Expired |
| US6126365A | Boring tool | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4376681A | Method of measuring carbon dioxide in a liquid or gas | Physics | 5 | Expired |
| US5626824A | Autoclave | Performing Operations; Transporting | 4 | Expired |
| US10085390B2 | Backpack type blowing apparatus | Fixed Constructions | 2 | Active |
| US8586025B2 | Method of inhibiting methanogenesis | Emerging Cross-Sectional Technologies | 2 | Active |
| US6980369B2 | Zoom lens | Physics | 2 | Expired |
| US5605611A | Carbon dioxide-generating electrode apparatus | Chemistry; Metallurgy | 2 | Expired |
| US4460451A | Steam-sterilizable carbon dioxide sensor | Physics | 1 | Expired |
| US10480427B2 | Choke valve structure | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US10300539B2 | Rotating-cutting-edge-type milling tool and cutting method using same | Performing Operations; Transporting | 0 | Active |
| US11162445B2 | Vehicle | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US7814325B2 | System, method and computer readable medium for certifying release of electronic information on an internet | Physics | 0 | Active |
| US6235189A | Method of supplying dissolved carbon dioxide to plants in an aqueous medium | Chemistry; Metallurgy | 0 | Expired |
| US11075497B2 | Laser device and internal combustion engine | Electricity | 0 | Active |
| US8888977B2 | Combination electrode for ion concentration measurement | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.