Kiyoshi Yoshikawa
44Patents
12h-index
42Co-inventors
81Inventor score
Filing activity: Mar 26, 1985 → Nov 9, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6313681A | Variable delay circuit | Electricity | 76 | Expired |
| US5273553A | Apparatus for bonding semiconductor substrates | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5455081A | Process for coating diamond-like carbon film and coated thin strip | Chemistry; Metallurgy | 59 | Expired |
| US4968375A | Etching apparatus | Electricity | 49 | Expired |
| US4752180A | Method and apparatus for handling semiconductor wafers | Emerging Cross-Sectional Technologies | 40 | Expired |
| US9632528B2 | Information processing apparatus, information processing method, and recording medium | Physics | 39 | Active |
| US6466076B2 | Variable delay circuit having a ramp voltage generating unit | Electricity | 37 | Expired |
| US5129827A | Method for bonding semiconductor substrates | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5344492A | Vapor growth apparatus for semiconductor devices | Chemistry; Metallurgy | 34 | Expired |
| US5176783A | Semiconductor substrate etching apparatus | Electricity | 15 | Expired |
| US5866198A | Method of fabricating a compound semiconductor having a plurality of layers using a flow compensation technique | Electricity | 13 | Expired |
| US7800433B2 | Power supply switching circuit | Electricity | 12 | Active |
| US5395446A | Semiconductor treatment apparatus | Electricity | 10 | Expired |
| US8217708B2 | Temperature sensor | Physics | 9 | Active |
| US4703222A | Hall accelerator with preionization discharge | Electricity | 8 | Expired |
| US7446602B2 | Switched capacitor amplifier circuit and method for operating a switched capacitor amplifier circuit | Electricity | 7 | Active |
| US8058845B2 | Battery state monitoring circuit and battery apparatus | Emerging Cross-Sectional Technologies | 4 | Active |
| US7990130B2 | Band gap reference voltage circuit | Physics | 4 | Active |
| US8471530B2 | Battery state monitoring circuit and battery device | Emerging Cross-Sectional Technologies | 4 | Active |
| US9679129B2 | Information processing device and information processing method | Physics | 2 | Active |
| US9959578B2 | Work management system and work management method | Emerging Cross-Sectional Technologies | 2 | Active |
| US7923968B2 | Charge and discharge control circuit and rechargeable power supply device | Emerging Cross-Sectional Technologies | 1 | Active |
| US8901966B2 | Sensor circuit | Electricity | 1 | Active |
| US8872490B2 | Voltage regulator | Emerging Cross-Sectional Technologies | 1 | Active |
| US7990669B2 | Battery protection circuit and battery device | Electricity | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.