Susumu Tatsumi
25Patents
15h-index
32Co-inventors
77Inventor score
Filing activity: Jan 9, 1976 → Oct 9, 1985
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4239374A | Electrostatographic apparatus comprising automatic document type determination means | Physics | 53 | Expired |
| US4215930A | Method of maintaining the correct conditions of an electrophotographically duplicated image | Physics | 49 | Expired |
| US4226525A | Electrostatic copying machine | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4200391A | Electrostatographic apparatus comprising document density sensing means | Physics | 45 | Expired |
| US4277163A | Variable magnification electrostatic copying machine | Physics | 39 | Expired |
| US4306804A | Exposure control and other component control for electrostatic copying machine | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4277549A | Copy image adjustment method | Physics | 26 | Expired |
| US4330749A | Electrometer apparatus | Physics | 21 | Expired |
| US4415533A | Process for treating exhaust gas from electrophotographic machine and apparatus thereof | Physics | 20 | Expired |
| US4195260A | Apparatus for sensing deterioration of developing substance including ferromagnetic carrier and non-magnetic toner particles | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4279498A | Electrostatographic copying apparatus with automatic toner density control | Physics | 19 | Expired |
| US4032229A | Construction of electrophotographic copying machines with a cleaning unit for photosensitive surface | Physics | 17 | Expired |
| US4080059A | Apparatus for cleaning a photosensitive member of an electrophotographic copying machine | Physics | 17 | Expired |
| US4318042A | Electrometer probe | Physics | 16 | Expired |
| US4210864A | Apparatus for sensing toner density using a stationary ferromagnetic mass within the toner to increase sensitivity | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4423134A | Developing unit for electrophotography | Physics | 11 | Expired |
| US4213693A | Electrostatographic apparatus comprising improved developing bias control | Physics | 11 | Expired |
| US4614682A | Thermosensitive image transfer recording medium | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4168329A | Auto-bias developing process and an electrophotographic copying machine | Physics | 10 | Expired |
| US4640129A | Method and apparatus for detecting toner concentration of two-component dry developer | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4266870A | Electrostatographic apparatus comprising developing bias means | Physics | 5 | Expired |
| US4139299A | Auto-bias developing apparatus | Physics | 4 | Expired |
| US3980049A | Developing unit for electrophotography | Physics | 3 | Expired |
| US4176942A | Electrophotographic copying apparatus | Physics | 3 | Expired |
| USRE32330E | Method of maintaining the correct conditions of an electrophotographically duplicated image | General | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.