Nobuyuki Ishikawa
69Patents
7h-index
86Co-inventors
75Inventor score
Filing activity: Nov 29, 1983 → Sep 6, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5421909A | Photovoltaic conversion device | Emerging Cross-Sectional Technologies | 56 | Expired |
| US5656098A | Photovoltaic conversion device and method for producing same | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5602851A | Multi-port bridge | Electricity | 28 | Expired |
| US5079525A | Audio-video modulator system on IC chip | Electricity | 15 | Expired |
| US5486796A | Oscillator circuit for receiving a wide frequency band signal | Electricity | 12 | Expired |
| US5248990A | Process for producing optical recording medium for optical data recording and reproduction | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4654607A | Modulation control circuit for an amplitude modulator | Electricity | 9 | Expired |
| US4544897A | Crystal oscillator circuit with feedback control | Electricity | 7 | Expired |
| US6839848B1 | Information processing system and peripheral apparatus | Physics | 7 | Expired |
| US9879334B2 | Abrasion resistant steel plate or steel sheet excellent in resistance to stress corrosion cracking and method for manufacturing the same | Chemistry; Metallurgy | 6 | Active |
| US5506547A | Frequency modulator having LC oscillator with switchable frequencies | Electricity | 5 | Expired |
| US9738957B2 | Wear resistant steel plate and manufacturing process therefor | Chemistry; Metallurgy | 4 | Active |
| US10788461B2 | Method and apparatus for measuring hydrogen-induced cracking | Physics | 4 | Active |
| US9938599B2 | Abrasion resistant steel plate or steel sheet excellent in resistance to stress corrosion cracking and method for manufacturing the same | Chemistry; Metallurgy | 4 | Active |
| US10093998B2 | Abrasion resistant steel plate having excellent low-temperature toughness and method for manufacturing the same | Chemistry; Metallurgy | 3 | Active |
| US9181609B2 | Welded steel pipe for linepipe having high compressive strength and excellent sour gas resistance and manufacturing method thereof | Chemistry; Metallurgy | 3 | Active |
| US8778096B2 | Low yield ratio, high strength and high toughness steel plate and method for manufacturing the same | Chemistry; Metallurgy | 3 | Active |
| US6652653B2 | Coating apparatus, method for producing color filter substrate by use of the coating apparatus, and liquid-crystal display apparatus using the color filter substrate produced by the method | Emerging Cross-Sectional Technologies | 3 | Expired |
| US10640841B2 | High-strength, high-toughness steel plate and method for producing the same | Chemistry; Metallurgy | 3 | Active |
| US7520943B2 | Steel plate and welded steel tube exhibiting low yield ratio, high strength and high toughness | Chemistry; Metallurgy | 3 | Expired |
| US8926766B2 | Low yield ratio, high strength and high uniform elongation steel plate and method for manufacturing the same | Chemistry; Metallurgy | 3 | Active |
| US9089919B2 | Welded steel pipe for linepipe with high compressive strength and manufacturing method thereof | Chemistry; Metallurgy | 3 | Active |
| US10617013B2 | Lead component mounting machine and lead component mounting method | Electricity | 3 | Active |
| US9836723B2 | Exchanging messages during a chat session | Electricity | 2 | Active |
| US10820460B2 | Cutting and bending device | Electricity | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.