Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7385932 | Wideband frequency domain reflectometry to determine the nature and location of subscriber line faults | Bernardo Celaya, Terence Monteith | 2008-06-10 |
| 6886181 | Extended distribution of ADSL signals | Oliver Cruder, Mark Labbe | 2005-04-26 |
| 6259836 | Optical frequency shifter and transmission system | — | 2001-07-10 |
| 5999300 | Hybrid single sideband optical modulator | Robert Davies, Jan Conradi | 1999-12-07 |
| 5880870 | Optical modulation system | Michael Sieben, Jan Conradi | 1999-03-09 |
| 5841841 | Networking computers via shared use of voice telephone lines | Gregory Jacob Erker | 1998-11-24 |
| 5612653 | LAN star connection using negative impedance for matching | Gregory Jacob Erker | 1997-03-18 |
| 4677646 | Dataset powered by control and data signals from data terminal | Ludo Arden Bertsch | 1987-06-30 |
| 4578541 | Telephone line interface circuit | — | 1986-03-25 |
| 4534038 | Coupling an electrical signal to transmission lines | Ludo Arden Bertsch | 1985-08-06 |
| 4534039 | Dataset powered by control and data signals from data terminal | Ludo Arden Bertsch | 1985-08-06 |
| 4525845 | Balanced circuit for connecting receiver and transmitter to transmission line | Ludo Arden Bertsch | 1985-06-25 |