Koji Maruyama
72Patents
15h-index
122Co-inventors
87Inventor score
Filing activity: Jan 17, 1985 → Jul 31, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6385389B1 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 142 | Expired |
| US5121385A | Highly efficient multiplexing system | Electricity | 118 | Expired |
| US5579502A | Memory card apparatus using EEPROMS for storing data and an interface buffer for buffering data transfer between the EEPROMS and an external device | Physics | 104 | Expired |
| US6453119B1 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 64 | Expired |
| US10553407B2 | Plasma processing method and plasma processing apparatus | Electricity | 40 | Active |
| US5398188A | Navigation apparatus and method for a vehicle for displaying positional information of the same | Physics | 40 | Expired |
| US6676804B1 | Method and apparatus for plasma processing | Emerging Cross-Sectional Technologies | 34 | Expired |
| US6795381B2 | Multi-body multi-purpose information processing apparatus | Physics | 34 | Expired |
| US8554356B2 | Processing end point detection method, polishing method, and polishing apparatus | Electricity | 20 | Active |
| US5763072A | Ceramic sliding member having pyrolytic carbon film and process of fabricating the same | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5587255A | Carbonaceous electrode material for secondary battery | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4739367A | Image forming apparatus having a control means for effecting control of a preliminary processing of image formation | Physics | 17 | Expired |
| US5745912A | Memory card apparatus including a link table for managing the correspondency between the recorded contents in the memory card and that in the link table | Electricity | 17 | Expired |
| US6161195A | EEPROM memory card device having defect relieving means | Physics | 15 | Expired |
| US5155718A | Optical record medium reading apparatus having a de-focussed light beam projected on an optical record medium | Physics | 15 | Expired |
| US4648706A | Image reproduction apparatus | Physics | 13 | Expired |
| US6767179B2 | Impeller and turbine type fuel pump | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6741798B2 | Information recording medium, method for recording information, and method for reproduction information | Electricity | 11 | Expired |
| US5483491A | Memory card device | Physics | 10 | Expired |
| US5233360A | Matching device for a microstrip antenna | Electricity | 9 | Expired |
| US6346957B1 | Optical scanning device and image forming apparatus that restrains color aberrations | Electricity | 9 | Expired |
| US8162470B2 | Inkjet printer | Performing Operations; Transporting | 8 | Active |
| USD303123S | Printer for electronic computer | General | 8 | Expired |
| US9705313B2 | Three-level inverter employing a bidirectional switch, and modular structure therefor | Emerging Cross-Sectional Technologies | 7 | Active |
| US7653760B2 | Information playback apparatus and information playback method with use of vendor ID comparison | Electricity | 7 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.