Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7346070 | Shared wireline code division multiple access | — | 2008-03-18 |
| 6912274 | System allowing telephone customers to send and retrieve electronic mail messages using only conventional telephonic devices | Bonnie P. Hitzeman | 2005-06-28 |
| 6408066 | ACD skill-based routing | Douglas Anthony Deutsch | 2002-06-18 |
| 5956394 | Common treatment of calls from subscribers served by different types of telecommunication equipment | Liane Toy Tsai | 1999-09-21 |
| 5937035 | Interswitch telephone status monitoring | Eugene William Foster | 1999-08-10 |
| 5673310 | Hierarchical switch support of services for subscribers of separate centrex exchanges | Liane Toy Tsai | 1997-09-30 |
| 5673312 | Control of call features provided to a subscriber by a hierarchical telecommunication switch | Liane Toy Tsai | 1997-09-30 |
| 5673311 | Hierarchical switch support of services for subscribers directly served by local exchange carriers | Liane Toy Tsai | 1997-09-30 |
| 5668860 | Call screening at a hierarchical switch based on organizational membership of the parties | Liane Toy Tsai | 1997-09-16 |
| 5652790 | Hierarchical switch support of services for subscribers based on organizational membership | Liane Toy Tsai | 1997-07-29 |
| 5646985 | Hierarchical switch support of services for subscribers of independent private branch exchanges | Liane Toy Tsai | 1997-07-08 |
| 5574780 | Controll of call features provided to a subscriber by a hierarchical telecommunication switch | Liane Toy Tsai | 1996-11-12 |
| 5550904 | Method for identifying the originating network at the terminating network for transnetwork calls | Thomas C. Ruvarac | 1996-08-27 |
| 5544236 | Access to unsubscribed features | Venkata C. Majeti | 1996-08-06 |