Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7055662 | Vehicle axle beam and brake assembly | Jeffrey L. Jones, Daniel E. Brooks, James R. Clark | 2006-06-06 |
| 4908861 | Data authentication using modification detection codes based on a public one way encryption function | Bruno O. Brachtl, Don Coppersmith, Myrna M. Hyden, Stephen M. Matyas, Jonathan Oseas +2 more | 1990-03-13 |
| 4850017 | Controlled use of cryptographic keys via generating station established control values | Stephen M. Matyas, Bruno O. Brachtl | 1989-07-18 |
| 4755940 | Transaction security system | Bruno O. Brachtl, Christopher J. Holloway, Richard E. Lennon, Stephen M. Matyas, Jonathan Oseas | 1988-07-05 |
| 4747050 | Transaction security system using time variant parameter | Bruno O. Brachtl, Christopher J. Holloway, Richard E. Lennon, Stephen M. Matyas, Jonathan Oseas | 1988-05-24 |
| 4527669 | Friction pad assemblies for use in disc brakes | Hans-Georg Madzgalla | 1985-07-09 |
| 4500750 | Cryptographic application for interbank verification | Robert C. Elander, Richard E. Lennon, Stephen M. Matyas, Robert E. Shuck, Walter L. Tuchman | 1985-02-19 |
| 4393269 | Method and apparatus incorporating a one-way sequence for transaction and identity verification | Alan G. Konheim, Stephen M. Matyas | 1983-07-12 |
| 4386234 | Cryptographic communication and file security using terminals | William F. Ehrsam, Robert C. Elander, Stephen M. Matyas, Robert L. Powers, Paul N. Prentice +2 more | 1983-05-31 |
| 4238854 | Cryptographic file security for single domain networks | William F. Ehrsam, Robert C. Elander, Stephen M. Matyas, John L. Smith, Walter L. Tuchman | 1980-12-09 |
| 4238853 | Cryptographic communication security for single domain networks | William F. Ehrsam, Robert C. Elander, Stephen M. Matyas, Robert L. Powers, Paul N. Prentice +2 more | 1980-12-09 |
| 4229818 | Method and apparatus for enciphering blocks which succeed short blocks in a key-controlled block-cipher cryptographic system | Stephen M. Matyas, Louis B. Tuckerman, III | 1980-10-21 |
| 4227253 | Cryptographic communication security for multiple domain networks | William F. Ehrsam, Robert C. Elander, Lloyd L. Hollis, Richard E. Lennon, Stephen M. Matyas +2 more | 1980-10-07 |
| 4218738 | Method for authenticating the identity of a user of an information system | Stephen M. Matyas | 1980-08-19 |
| 4206315 | Digital signature system and apparatus | Stephen M. Matyas, Walter L. Tuchman | 1980-06-03 |
| 4203166 | Cryptographic file security for multiple domain networks | William F. Ehrsam, Robert C. Elander, Stephen M. Matyas, Richard J. Sahulka, Walter L. Tuchman | 1980-05-13 |
| 4193131 | Cryptographic verification of operational keys used in communication networks | Richard E. Lennon, Stephen M. Matyas, Jonathan Oseas, Paul N. Prentice, Walter L. Tuchman | 1980-03-11 |