Ryuichi Okamoto
37Patents
9h-index
36Co-inventors
75Inventor score
Filing activity: Aug 21, 1990 → Oct 16, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5064999A | Advance transaction processing method | Physics | 179 | Expired |
| US6901385B2 | Semiconductor memory card that records contents for trial and purchase, recording apparatus, reproducing apparatus, and sales method | Physics | 56 | Expired |
| US7103663B2 | License management server, license management system and usage restriction method | Electricity | 45 | Expired |
| US6732106B2 | Digital data distribution system | Emerging Cross-Sectional Technologies | 41 | Expired |
| US7395245B2 | Content usage management system and server used in the system | Physics | 36 | Expired |
| US6336028B1 | Software function adding method | Physics | 25 | Expired |
| US5455406A | Automatic transaction apparatus | Physics | 21 | Expired |
| US6947775B2 | System, method, program and storage medium for saving power | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7940935B2 | Content playback apparatus, content playback method, computer program, key relay apparatus, and recording medium | Physics | 13 | Active |
| US7571488B2 | Rights management terminal, server apparatus and usage information collection system | Electricity | 8 | Active |
| US7835993B2 | License management device and method | Electricity | 8 | Active |
| US7760988B2 | Content use device and recording medium | Physics | 6 | Active |
| US7676042B2 | Terminal apparatus, server apparatus, and digital content distribution system | Physics | 5 | Active |
| US6799279B1 | Method and apparatus for stopping supply of power to a specific function for playing contents stored on media in response to a low battery level | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7721088B2 | Terminal device, server device, and content distribution system | Electricity | 4 | Active |
| US8260714B2 | Terminal apparatus and system thereof | Physics | 3 | Active |
| US10659306B2 | Information processing device and method for setting the environment of the device | Electricity | 2 | Active |
| US7680808B2 | Transmission apparatus, content reproduction apparatus, and content and license distribution system | Electricity | 2 | Expired |
| US5943419A | Subscriber circuit with built-in polarity switching circuit | Electricity | 1 | Expired |
| US7624199B2 | Digital data distribution system with switching unit, online acquisition unit, and conversion unit for converting from first to second format | Physics | 1 | Expired |
| US9276770B2 | Network connecting device and method | Electricity | 1 | Active |
| US7984508B2 | Contents using device, and contents using method | Physics | 1 | Active |
| US8166555B2 | Content reproducing device and content preproducing method | Electricity | 0 | Active |
| US7457779B2 | User terminal program designated not to receive contents that cannot achieve users' object | Physics | 0 | Active |
| US9054900B2 | Network connection device and method | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.