Ryuji Okamura
77Patents
15h-index
77Co-inventors
87Inventor score
Filing activity: Aug 29, 1989 → Dec 7, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6203618A | Exhaust system and vacuum processing apparatus | Chemistry; Metallurgy | 361 | Expired |
| US5514217A | Microwave plasma CVD apparatus with a deposition chamber having a circumferential wall comprising a curved moving substrate web and a microwave applicator means having a specific dielectric member on the exterior thereof | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6500500B1 | Method for forming a deposited film by plasma chemical vapor deposition | Chemistry; Metallurgy | 44 | Expired |
| US5443645A | Microwave plasma CVD apparatus comprising coaxially aligned multiple gas pipe gas feed structure | Chemistry; Metallurgy | 41 | Expired |
| US6702898B2 | Deposited film forming apparatus | Chemistry; Metallurgy | 40 | Expired |
| US5455138A | Process for forming deposited film for light-receiving member, light-receiving member produced by the process, deposited film forming apparatus, and method for cleaning deposited film forming apparatus | Physics | 28 | Expired |
| US5817181A | Process for forming deposited film for light-receiving member, light-received member produced by the process deposited film forming apparatus, and method for cleaning deposited film forming apparatus | Physics | 25 | Expired |
| US5030476A | Process and apparatus for the formation of a functional deposited film on a cylindrical substrate by means of microwave plasma chemical vapor deposition | Chemistry; Metallurgy | 24 | Expired |
| US5284730A | Electrophotographic light-receiving member | Physics | 20 | Expired |
| US6586149B2 | Light-receiving member, image-forming apparatus, and image-forming method | Physics | 19 | Expired |
| US6285566A | RCC power supply with remote disabling of oscillation frequency control | Electricity | 17 | Expired |
| US4954397A | Light receiving member having a divided-functionally structured light receiving layer having CGL and CTL for use in electrophotography | Physics | 16 | Expired |
| US5637358A | Microwave plasma chemical vapor deposition process using a microwave window and movable, dielectric sheet | Electricity | 16 | Expired |
| US5016565A | Microwave plasma chemical vapor deposition apparatus for forming functional deposited film with means for stabilizing plasma discharge | Chemistry; Metallurgy | 16 | Expired |
| US5439715A | Process and apparatus for microwave plasma chemical vapor deposition | Chemistry; Metallurgy | 16 | Expired |
| US5314780A | Method for treating metal substrate for electro-photographic photosensitive member and method for manufacturing electrophotographic photosensitive member | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6135053A | Apparatus for forming a deposited film by plasma chemical vapor deposition | Chemistry; Metallurgy | 14 | Expired |
| US5514506A | Light receiving member having a multi-layered light receiving layer with an enhanced concentration of hydrogen or/and halogen atoms in the vicinity of the interface of adjacent layers | Physics | 13 | Expired |
| US5232507A | Apparatus for forming deposited films with microwave plasma CVD method | Electricity | 12 | Expired |
| US5433790A | Deposit film forming apparatus with microwave CVD method | Electricity | 10 | Expired |
| US5273851A | Electrophotographic light-receiving member having surface region with high ratio of Si bonded to C | Physics | 9 | Expired |
| US7033717B2 | Process for producing electrophotographic photosensitive member, and electrophotographic photosensitive member and electrophotographic apparatus making use of the same | Physics | 8 | Expired |
| US6078508A | Self-oscillation type switching power supply apparatus | Electricity | 8 | Expired |
| US6165274A | Plasma processing apparatus and method | Electricity | 8 | Expired |
| US5597623A | Process for using microwave plasma CVD | Electricity | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.