Motoji Ohmori
227Patents
20h-index
158Co-inventors
93Inventor score
Filing activity: Mar 19, 1981 → Mar 12, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4453407A | Vibration diagnosis method and apparatus for rotary machines | Physics | 70 | Expired |
| US7917764B2 | Signature generation device and signature verification device | Electricity | 69 | Active |
| US4435770A | Vibration diagnosing method and apparatus for a rotary machine | Physics | 67 | Expired |
| US7353543B2 | Contents distribution system | Electricity | 66 | Expired |
| US6917684B1 | Method of encryption and decryption with block number dependant key sets, each set having a different number of keys | Electricity | 48 | Expired |
| US7698743B2 | Authentication server, method and system for detecting unauthorized terminal | Electricity | 43 | Active |
| US6289314A | Pay information providing system for descrambling information from plural sources and rescrambling the information before sending to a terminal or terminals | Electricity | 43 | Expired |
| US6009174A | Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded | Electricity | 42 | Expired |
| US6995692B2 | Data converter and method thereof | Electricity | 41 | Expired |
| US6570989B1 | CRYPTOGRAPHIC PROCESSING APPARATUS, CRYPTOGRAPHIC PROCESSING METHOD, AND STORAGE MEDIUM STORING CRYPTOGRAPHIC PROCESSING PROGRAM FOR REALIZING HIGH-SPEED CRYPTOGRAPHIC PROCESSING WITHOUT IMPAIRING SECURITY | Electricity | 36 | Expired |
| US7448087B2 | System for preventing unauthorized use of recording media | Electricity | 35 | Expired |
| US7484090B2 | Encryption apparatus, decryption apparatus, secret key generation apparatus, and copyright protection system | Electricity | 30 | Active |
| US7783884B2 | Content providing system, information processing device and memory card | Electricity | 28 | Active |
| US6304657A | Data encryption apparatus using odd number of shift-rotations and method | Electricity | 24 | Expired |
| US7401232B2 | Content playback apparatus method and program and key management apparatus and system | Electricity | 22 | Expired |
| US7549061B2 | Unauthorized contents detection system | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4448077A | Vibration diagnosis method for rotary machine | Physics | 22 | Expired |
| US8261084B2 | Unauthorized contents detection system | Emerging Cross-Sectional Technologies | 21 | Active |
| US7743261B2 | Unauthorized contents detection system | Emerging Cross-Sectional Technologies | 20 | Active |
| US6459792B2 | Block cipher using key data merged with an intermediate block generated from a previous block | Electricity | 20 | Expired |
| US7813512B2 | Encrypted communication system and communication device | Electricity | 19 | Expired |
| US6994263B2 | IC card | Physics | 19 | Expired |
| US10445751B2 | Information obtaining method, information obtaining system, and information appliance | Electricity | 18 | Active |
| US7647646B2 | Information input/output system, key management device, and user device | Electricity | 17 | Expired |
| US7427022B2 | Ticket management system, terminal device, ticket management server, register device, value conversion method, computer program, and recording medium | Physics | 16 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.