Hellman; Martin E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hellman; Martin E..The latest application filed is for "tiered subscription broadcast system".
- Hellman; Martin E. - Stanford CA US
- Hellman; Martin E - Stanford CA US
| Patent | Date |
|---|---|
| Tiered subscription broadcast system Grant 9,124,375 - Hellman September 1, 2 | 2015-09-01 |
| Tiered subscription broadcast system Grant 8,627,354 - Hellman January 7, 2 | 2014-01-07 |
| FM broadcast system competitive with satellite radio Grant 8,401,462 - Hellman March 19, 2 | 2013-03-19 |
| Dropout-resistant media broadcasting system Grant 8,270,901 - Hellman September 18, 2 | 2012-09-18 |
| Security enhanced tiered subscription broadcast system Grant 7,865,917 - Hellman January 4, 2 | 2011-01-04 |
| FM broadcast system competitive with satellite radio Grant 7,840,178 - Hellman November 23, 2 | 2010-11-23 |
| Tiered subscription broadcast system App 20070140318 - Hellman; Martin E. | 2007-06-21 |
| Security enhanced tiered subscription broadcast system App 20060190970 - Hellman; Martin E. | 2006-08-24 |
| Dropout-resistant media broadcasting system App 20060136967 - Hellman; Martin E. | 2006-06-22 |
| Authentication using random challenges Grant 5,872,917 - Hellman February 16, 1 | 1999-02-16 |
| Software distribution system Grant 4,658,093 - Hellman April 14, 1 | 1987-04-14 |
| Method and apparatus for use in public-key data encryption system Grant 4,633,036 - Hellman , et al. December 30, 1 | 1986-12-30 |
| Exponentiation cryptographic apparatus and method Grant 4,424,414 - Hellman , et al. January 3, 1 | 1984-01-03 |
| Public key cryptographic apparatus and method Grant 4,218,582 - Hellman , et al. August 19, 1 | 1980-08-19 |
| Cryptographic apparatus and method Grant 4,200,770 - Hellman , et al. April 29, 1 | 1980-04-29 |
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