Inventor · disambiguated record
William F. Ehrsam
Also filed as: EHRSAM WILLIAM F · EHRSAM WILLIAM FRIEDRICH
8 granted patents·1,714 citations·filing 1975–1977
93Inventor score
Files withIBM8
Top patents by PatentIndex Score
8 records- 0198US3962539AProduct block cipher system for data securityIBM·Filed 1975·Granted Jun 8, 1976·423 cites·10 claims
- 0297US4238853ACryptographic communication security for single domain networksIBM·Filed 1977·Granted Dec 9, 1980·194 cites·49 claims
- 0397US4238854ACryptographic file security for single domain networksIBM·Filed 1977·Granted Dec 9, 1980·237 cites·42 claims
- 0497US4203166ACryptographic file security for multiple domain networksIBM·Filed 1977·Granted May 13, 1980·264 cites·43 claims
- 0597US3958081ABlock cipher system for data securityIBM·Filed 1975·Granted May 18, 1976·266 cites·16 claims
- 0696US4227253ACryptographic communication security for multiple domain networksIBM·Filed 1977·Granted Oct 7, 1980·183 cites·47 claims
- 0792US4386234ACryptographic communication and file security using terminalsIBM·Filed 1977·Granted May 31, 1983·84 cites·46 claims
- 0888US4074066AMessage verification and transmission error detection by block chainingIBM·Filed 1976·Granted Feb 14, 1978·63 cites·12 claims
Join the waitlist — get patent alerts
Get an alert when William F. Ehrsam files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →