Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7904952 | System and method for access control | Dafu Lou, William G. O'Brien | 2011-03-08 |
| 7861081 | Security system and method | William G. O'Brien, Dafu Lou, Ren Xiaoli | 2010-12-28 |
| 7806325 | Contact-less tag with signature, and applications thereof | William G. O'Brien | 2010-10-05 |
| 7774602 | Secure modem gateway concentrator | William G. O'Brien, Dafu Lou | 2010-08-10 |
| 7660575 | Adapter for secure VoIP communications | William G. O'Brien, Xiaoli Ren, Dafu Lou | 2010-02-09 |
| 7246744 | User authentication for contact-less systems | William G. O'Brien | 2007-07-24 |
| 6959056 | RFI canceller using narrowband and wideband noise estimators | David Kenneth Fenton | 2005-10-25 |
| 6940973 | Method and apparatus for cancelling common mode noise occurring in communications channels | David Kenneth Fenton | 2005-09-06 |
| 6546057 | Suppression of radio frequency interference and impulse noise in communications channels | — | 2003-04-08 |
| 6476749 | High speed analog-to-digital converter and digital-to-analog converter | Bharathi Ganesan | 2002-11-05 |
| 6456657 | Frequency division multiplexed transmission of sub-band signals | Esam ABDEL-RAHEEM | 2002-09-24 |
| 6052420 | Adaptive multiple sub-band common-mode RFI suppression | Pierre Donald Lefebvre | 2000-04-18 |