Takao Kawamura
14Patents
0Active
14Granted
31Portfolio score
Filing activity: Mar 8, 1982 → Nov 4, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4451546A | Photosensitive member | Physics | 31 | Expired |
| US4624906A | Electrophotographic sensitive member having a fluorinated amorphous silicon photoconductive layer | Physics | 21 | Expired |
| US4409311A | Photosensitive member | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5256513A | Electroconductive magnetic carrier, developer using the same and image formation method | Physics | 15 | Expired |
| US6826382B2 | Heat plate, heating element, belt type fixing device and image forming apparatus | Electricity | 12 | Expired |
| US5318873A | Electroconductive magnetic carrier, developer using the same and image formation method | Physics | 11 | Expired |
| US4882252A | Electrophotographic sensitive member with amorphous silicon carbide | Physics | 8 | Expired |
| US5106711A | Electrophotographic sensitive member | Physics | 6 | Expired |
| US4675264A | Electrophotographic sensitive member with amorphous Si barrier layer | Physics | 5 | Expired |
| US7109441B2 | Heat plate, heating element, belt type fixing device and image forming apparatus | Electricity | 3 | Expired |
| US4645304A | Liquid crystal device having interdigitated electrodes with shade member | Physics | 3 | Expired |
| US4906546A | Electrophotographic sensitive member | Physics | 1 | Expired |
| US4826748A | Electrophotographic sensitive member | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5529866A | Electrophotographic sensitive member | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.