Kazuo Ohta
24Patents
10h-index
31Co-inventors
75Inventor score
Filing activity: Feb 1, 1977 → Mar 2, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4977595A | Method and apparatus for implementing electronic cash | Electricity | 363 | Expired |
| US5224162A | Electronic cash system | Electricity | 144 | Expired |
| US5901229A | Electronic cash implementing method using a trustee | Electricity | 124 | Expired |
| US4969189A | Authentication system and apparatus therefor | Electricity | 87 | Expired |
| US5889862A | Method and apparatus for implementing traceable electronic cash | Electricity | 81 | Expired |
| US6769063B1 | Data converter and recording medium on which program for executing data conversion is recorded | Electricity | 38 | Expired |
| US6038581A | Scheme for arithmetic operations in finite field and group operations over elliptic curves realizing improved computational speed | Physics | 26 | Expired |
| US6212637A | Method and apparatus for en-bloc verification of plural digital signatures and recording medium with the method recorded thereon | Electricity | 24 | Expired |
| US4855235A | Monoclonal antibodies to human leukocyte antigens | Emerging Cross-Sectional Technologies | 11 | Expired |
| US8917342B2 | Solid-state imaging element, method for producing solid-state imaging element, and electronic device | Electricity | 11 | Active |
| US6202076A | Scheme for arithmetic operations in finite field and group operations over elliptic curves realizing improved computational speed | Physics | 7 | Expired |
| US6266688A | Scheme for arithmetic operations in finite field and group operations over elliptic curves realizing improved computational speed | Physics | 7 | Expired |
| US7187769B1 | Method and apparatus for evaluating the strength of an encryption | Electricity | 6 | Expired |
| US9537653B2 | Encryption key generating apparatus and computer program product | Electricity | 6 | Active |
| US4100456A | Luminescent display panel comprising a sealing mass for eliminating slow leaks along leads | Electricity | 5 | Expired |
| US8427372B2 | Array antenna | Physics | 5 | Active |
| US5518255A | Carbon-based composite ceramic sealing material | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| UST988002I4 | Apparatus for forming a vacuum evaporating layer on a substrate | General | 2 | Expired |
| US7496759B2 | Multisignature method, apparatus, program, and system | Electricity | 2 | Active |
| US5540451A | Composite sealing material | Emerging Cross-Sectional Technologies | 1 | Expired |
| US9984239B2 | Concealing apparatus, decoding apparatus, concealing method, and decoding method | Physics | 0 | Active |
| US10027479B2 | Generating device, encryption device, decryption device, generating method, encryption method, decryption method, and computer program product | Electricity | 0 | Active |
| US8876542B2 | Connector and construction machine | Electricity | 0 | Active |
| US9269735B2 | Method of manufacturing solid-state imaging device, solid-state imaging device, and electronic apparatus | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.