Hirokazu Yamada
100Patents
18h-index
133Co-inventors
89Inventor score
Filing activity: Oct 28, 1985 → Feb 1, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5224157A | Management system for managing maintenance information of image forming apparatus | Electricity | 171 | Expired |
| US6094282A | Camera capable of recording and reproducing a photographed image | Electricity | 116 | Expired |
| USD662643S1 | Lighting fixture | General | 51 | Active |
| USD647241S1 | Lighting fixture | General | 41 | Expired |
| USD723166S1 | Stent | General | 36 | Active |
| US7173373B2 | Organic light emitting device, manufacturing method thereof, and display unit | Electricity | 36 | Expired |
| US5499113A | Image data processing system with still video camera and digital image forming apparatus | Electricity | 31 | Expired |
| US5212446A | Magneto-optical element and magnetic field measurement apparatus | Electricity | 31 | Expired |
| US5102647A | Method of producing vapor growth carbon fibers | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5251295A | Image processing system having slave processors for controlling standard and optional modules | Physics | 27 | Expired |
| US6869581B2 | Hollow graphene sheet structure, electrode structure, process for the production thereof, and device thus produced | Electricity | 26 | Expired |
| US6603126B2 | UV/fluorescence detecting apparatus and sensing method thereof | Physics | 26 | Expired |
| US4814825A | Multiple speed sheet inverting and discharge | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4884103A | Programmed control device for copying machines and the like | Physics | 22 | Expired |
| USD675771S1 | Floodlight | General | 21 | Active |
| US5171489A | Method of producing composite staple fibers consisting of resin matrix and fine inorganic fibers | Performing Operations; Transporting | 19 | Expired |
| USD640815S1 | Spotlight | General | 18 | Expired |
| US5762771A | Air-fuel ratio sensor | Physics | 18 | Expired |
| US6214186A | Gas sensor having improved structure for installation of protective cover | Physics | 16 | Expired |
| US5087720A | Polysilethylenesiloxane | Chemistry; Metallurgy | 16 | Expired |
| USD634874S1 | Streetlight | General | 15 | Expired |
| US8814396B2 | Lighting apparatus | Mechanical Engineering; Lighting; Heating | 15 | Active |
| US6807907B2 | Printing system for carrying out energy conservation operation | Physics | 14 | Expired |
| US6688157B2 | Gas sensor having pre-stressed terminal for contact with inserted sensor element | Physics | 13 | Expired |
| US6222372A | Structure of gas sensor | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.