Hiroshi Nakazawa
75Patents
13h-index
117Co-inventors
87Inventor score
Filing activity: Aug 24, 1977 → Sep 3, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8369056B2 | Power supply control device, method for controlling power supply, program and power supply device | Electricity | 811 | Active |
| US4880719A | Two component electrophotographic developer | Physics | 59 | Expired |
| US4236198A | Switching regulator | Emerging Cross-Sectional Technologies | 54 | Expired |
| US6970812B2 | Virtual-space providing apparatus, virtual-space providing system, and virtual-space providing method | Physics | 40 | Expired |
| US7267920B2 | Toner for developing electrostatic latent images, production method thereof, and electrostatic latent image developer using the same | Physics | 29 | Expired |
| US4180852A | Control circuit for use in a switching-type regulator | Electricity | 26 | Expired |
| US4564709A | Process for the production of dialkyl-trisulfides | Chemistry; Metallurgy | 25 | Expired |
| US4194743A | Record player | Electricity | 22 | Expired |
| US4335423A | Transformer | Electricity | 20 | Expired |
| US5448435A | Disc drive magnetic latch having permanent magnet and electromagnet | Physics | 18 | Expired |
| US5296324A | Toner for developing electrostatic charge image and process for preparing the same | Physics | 18 | Expired |
| US5698357A | Toner and developer for developing electrostatic latent image, and image forming process using the same | Physics | 14 | Expired |
| US7964300B2 | Battery pack | Emerging Cross-Sectional Technologies | 14 | Active |
| US4365326A | Record player | Physics | 13 | Expired |
| US6088189A | Cartridge entry/exit station for a library apparatus | Physics | 13 | Expired |
| US6001527A | Electrostatic charge image developer, image formation method and image forming device | Physics | 12 | Expired |
| US8461807B2 | Battery protection circuit, method for protecting battery, power supply device and program | Emerging Cross-Sectional Technologies | 11 | Active |
| US5498867A | Wavelength-division multiplex digital optical position sensor | Physics | 11 | Expired |
| US6198594A | Cartridge forced exit station for a library apparatus | Physics | 10 | Expired |
| US4742366A | Camera having means for receiving a film cassette | Physics | 10 | Expired |
| US5965312A | One-component developer | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4837100A | Electrophotographic developer containing positively chargeable toner | Physics | 10 | Expired |
| US5972547A | Electrostatic charge image developing toner, electrostatic charge image developer, and image forming method using this developer | Physics | 10 | Expired |
| US4240134A | Switching regulator | Electricity | 9 | Expired |
| US7859226B2 | Method and device for safety protection of secondary battery | Emerging Cross-Sectional Technologies | 9 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.