Martin E. Hellman
12Patents
8h-index
4Co-inventors
65Inventor score
Filing activity: Sep 6, 1977 → Jan 6, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4658093A | Software distribution system | Electricity | 1,066 | Expired |
| US4200770A | Cryptographic apparatus and method | Electricity | 1,048 | Expired |
| US4218582A | Public key cryptographic apparatus and method | Electricity | 598 | Expired |
| US4424414A | Exponentiation cryptographic apparatus and method | Electricity | 364 | Expired |
| US4633036A | Method and apparatus for use in public-key data encryption system | Electricity | 76 | Expired |
| US5872917A | Authentication using random challenges | Physics | 73 | Expired |
| US7840178B2 | FM broadcast system competitive with satellite radio | Electricity | 44 | Active |
| US7865917B2 | Security enhanced tiered subscription broadcast system | Electricity | 20 | Active |
| US8270901B2 | Dropout-resistant media broadcasting system | Electricity | 6 | Active |
| US8627354B2 | Tiered subscription broadcast system | Electricity | 6 | Active |
| US8401462B2 | FM broadcast system competitive with satellite radio | Electricity | 3 | Active |
| US9124375B1 | Tiered subscription broadcast system | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.