Keiji Masuda
10Patents
5h-index
16Co-inventors
63Inventor score
Filing activity: Aug 8, 1975 → Mar 15, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8558614B2 | Amplification device | Electricity | 18 | Active |
| US4908513A | Charging apparatus | Physics | 15 | Expired |
| US5751431A | Digital image forming apparatus capable of easily installing and removing optical scanner unit | Electricity | 11 | Expired |
| US4367690A | Heated roller type fixing apparatus | Physics | 8 | Expired |
| US4939537A | Exposure controlling apparatus | Physics | 6 | Expired |
| US5921537A | Post-processing apparatus of digital image forming apparatus | Electricity | 4 | Expired |
| US8659358B2 | Amplifier, transmission apparatus, and gate voltage determination method | Electricity | 4 | Active |
| US4448511A | Electrophotographic recording apparatus with corona-discharge device having cover means between end of discharge wire and electrophotosensitive surface | Physics | 3 | Expired |
| US4428661A | Magnetic brush type developing device | Physics | 3 | Expired |
| US4001257A | Process for producing nicotinic acid | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.