Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699437 | Active noise control system using phased-array sensors | — | 1997-12-16 |
| 5682024 | Elevator position determination | Philip J. Koopman, Jr. | 1997-10-28 |
| 5649014 | Pseudorandom composition-based cryptographic authentication process | Philip J. Koopman, Jr., Robert E. LaBarre | 1997-07-15 |
| 5619575 | Pseudorandom composition-based cryptographic authentication process | Philip J. Koopman, Jr., Robert E. LaBarre | 1997-04-08 |