Yasuhiro Ishikawa
87Patents
10h-index
90Co-inventors
81Inventor score
Filing activity: Apr 20, 1982 → Mar 19, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6332790A | Card connector | Electricity | 26 | Expired |
| US6254889A | Solid dispersion dosage form of amorphous xanthine derivative and enteric-coating polymer | Chemistry; Metallurgy | 25 | Expired |
| US8981017B2 | Polycarbonate-polyorganosiloxane copolymer, process for production of the copolymer, and polycarbonate resin containing the copolymer | Chemistry; Metallurgy | 22 | Active |
| USD622375S1 | Portion of an infusion solution bag | General | 21 | Expired |
| US9080021B2 | Polycarbonate-polyorganosiloxane copolymer and method for producing same | Chemistry; Metallurgy | 20 | Active |
| US5062809A | High-frequency connector and method of manufacturing thereof | Electricity | 17 | Expired |
| US5772352A | Ball joint having extended service life | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4748168A | Rubber compositions for tire treads | Chemistry; Metallurgy | 15 | Expired |
| USD623734S1 | Portion of an infusion solution bag | General | 14 | Expired |
| US6964779B1 | Tablet manufacturing method and tablet | Performing Operations; Transporting | 12 | Expired |
| US5942594A | Polycarbonate and process for producing the same | Chemistry; Metallurgy | 10 | Expired |
| US4518733A | Rubber compositions comprising (1) polyisoprene (2) cobalt salt of rosin (3) carbon black and (4) sulphur | Chemistry; Metallurgy | 9 | Expired |
| US6987141B2 | Polycarbonate resin composition | Chemistry; Metallurgy | 9 | Expired |
| US4947916A | Pneumatic radial tire having belt reinforcements | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5500482A | Rubber composition for tire tread | Chemistry; Metallurgy | 7 | Expired |
| US9359473B2 | Method for continuous production of polycarbonate-polyorganosiloxane copolymer | Chemistry; Metallurgy | 6 | Active |
| US6511349B2 | Connection-retaining unit | Electricity | 6 | Expired |
| US7362924B2 | Optical modulator | Physics | 5 | Active |
| US6268462A | Branched polycarbonate resin and process for the preparation thereof | Chemistry; Metallurgy | 5 | Expired |
| US6316071A | Substrate for digital versatile disk and process for producing the same | Emerging Cross-Sectional Technologies | 5 | Expired |
| USD623735S1 | Portion of an infusion solution bag | General | 4 | Expired |
| US6222004A | Branched polycarbonate resin | Chemistry; Metallurgy | 4 | Expired |
| US9081139B2 | Optical waveguide device | Physics | 4 | Active |
| US8845611B2 | Multi-chamber bag | Human Necessities | 4 | Active |
| US9081214B2 | Optical control element | Physics | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.