Patents per Year
Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 9124375 | Tiered subscription broadcast system | — | 2015-09-01 | |
| 8627354 | Tiered subscription broadcast system | — | 2014-01-07 | |
| 8401462 | FM broadcast system competitive with satellite radio | — | 2013-03-19 | |
| 8270901 | Dropout-resistant media broadcasting system | — | 2012-09-18 | |
| 7865917 | Security enhanced tiered subscription broadcast system | — | 2011-01-04 | |
| 7840178 | FM broadcast system competitive with satellite radio | — | 2010-11-23 | |
| 5872917 | Authentication using random challenges | — | 1999-02-16 | $989,831,000 |
| 4658093 | Software distribution system | — | 1987-04-14 | |
| 4633036 | Method and apparatus for use in public-key data encryption system | Carl E. Bach | 1986-12-30 | |
| 4424414 | Exponentiation cryptographic apparatus and method | Stephen C. Pohlig | 1984-01-03 | |
| 4218582 | Public key cryptographic apparatus and method | Ralph C. Merkle | 1980-08-19 | |
| 4200770 | Cryptographic apparatus and method | Bailey W. Diffie, Ralph C. Merkle | 1980-04-29 |