Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6885745 | Voltage and protection arrangement for a telephone subscriber line interface circuit | Martin R. Handforth, Gerard J. Hupe, Rolf Meier, Canute Planthara, Raymond K. Wong | 2005-04-26 |
| 6507654 | Line interface battery feed arrangements with PTC resistors | Martin R. Handforth, Gyula Jakab | 2003-01-14 |
| 5333192 | Line interface circuit | — | 1994-07-26 |
| 5103387 | High voltage converter | Stanley D. Rosenbaum, Brian A. F. S. Sutherland | 1992-04-07 |
| 4849846 | Telephone protection circuit | Francis Y. Hung | 1989-07-18 |