Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6937157 | Smart cable for design of high density metallic cross connect systems | P. Kingston Duffie, Timothy John Hodgkinson | 2005-08-30 |
| 6903939 | Physical architecture for design of high density metallic cross connect systems | P. Kingston Duffie, Timothy John Hodgkinson | 2005-06-07 |
| 6870724 | Protection of double end exposed systems | — | 2005-03-22 |
| 6741675 | Method and apparatus for generating an audible tone in DSL environment | P. Kingston Duffle | 2004-05-25 |
| 6700770 | Protection of double end exposed systems | — | 2004-03-02 |
| 6683768 | Circuit topology for protecting vulnerable micro electro-mechanical system (MEMS) and electronic relay devices | — | 2004-01-27 |
| 6671149 | Systems and methods for protecting vulnerable micro electro-mechanical system (MEMS) and electronic relay devices | P. Kingston Duffie, Harry Rodriguez, Robert Crofford | 2003-12-30 |
| 6574313 | Voice over DSL method and system for supporting a lifeline | P. Kingston Duffie | 2003-06-03 |
| 6574309 | Remotely actuated splittler bypass system and method | P. Kingston Duffie | 2003-06-03 |
| 6553105 | Enabling and powering of remotely actuated bypass splitters | P. Kingston Duffie | 2003-04-22 |
| 6546089 | Method and system for supporting a lifeline associated with voice over DSL | P. Kingston Duffie | 2003-04-08 |
| 6480575 | Structure and circuit topology for a remotely actuated bypass splitter | P. Kingston Duffie | 2002-11-12 |
| 6453016 | Method and apparatus for detecting and locating a fault in a telecommunications environment | — | 2002-09-17 |
| 6343114 | Remotely addressable maintenance unit | — | 2002-01-29 |
| 6292540 | Battery injection and loop supervision for DSL environment | P. Kingston Duffle | 2001-09-18 |
| 4674119 | Wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry | — | 1987-06-16 |
| 4656659 | Programmable ring signal generator | — | 1987-04-07 |
| 4602130 | Dual voltage source feed circuit configuration for a telephone line circuit | — | 1986-07-22 |
| 4598173 | Interface circuit for a subscriber line circuit | Kevin C. Keegan, Reddeppa N. Pothuri, Albert H. Lloyd, Jr. | 1986-07-01 |
| 4456991 | Telephone line circuit and system | Santanu Das, Daniel C. Upp, Jozef Cornu, Johan M. R. Danneels, Jean Taeymans | 1984-06-26 |
| 4435803 | Analog subscriber/trunk module with shared ringing source and ring-trip | Santanu Das, Russ C. Casterline | 1984-03-06 |
| 4431868 | Solid state telephone line interface circuit with ringing capability | Daniel M. A. F. Bolus | 1984-02-14 |
| 4387273 | Subscriber line interface circuit with impedance synthesizer | — | 1983-06-07 |
| 4349703 | Programmable ring signal generator | — | 1982-09-14 |
| 4317963 | Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control | — | 1982-03-02 |