Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11122138 | Enhanced domain name system response caching | Ashutosh Kumar Sinha | 2021-09-14 |
| 11050707 | Systems and methods for updating a resource address | Ashutosh Kumar Sinha | 2021-06-29 |
| 10805417 | Enhanced domain name system response caching | Ashutosh Kumar Sinha | 2020-10-13 |
| 10798134 | Internet protocol (IP) multimedia subsystem (IMS) based session initiation protocol (SIP) call setup retry | Ashutosh Kumar Sinha | 2020-10-06 |
| 9560192 | Methods and apparatus for provisioning and using IP clients which can be arranged according to groups and share a common telephone number | Thirumal Ramachandruni, Mathivanan Manickam, Naresh Dhiman, Selcuk Ozler, Peter McGrath | 2017-01-31 |
| 8548151 | Method for migrating from an old communication switch to a new communication switch | — | 2013-10-01 |
| 7881452 | Method for testing a local number portability (LNP) ported telephone number | — | 2011-02-01 |
| 7751549 | Tandem switch migration method | — | 2010-07-06 |
| 7643616 | Method for testing an assigned location routing number (LRN) | — | 2010-01-05 |
| 7522607 | Congestion handling in a packet communication system | Michael K. Bugenhagen, Jack E. Brown | 2009-04-21 |
| 7394820 | Interworking unit (IWU) for interfacing a plurality of client devices to a multiprotocol label switching (MPLS) | — | 2008-07-01 |
| 7369558 | ATM connection allocation in ATM networks | Danmei Wu | 2008-05-06 |
| 7106741 | Establishing communication paths to law enforcement agencies | — | 2006-09-12 |
| 7068598 | IP packet access gateway | Sidney Bryson, Ronald Davis, Scott Douglas Olmstead, Monica Sentoff, Shang-Fon Su +3 more | 2006-06-27 |
| 7016314 | Method and apparatus for transferring ATM services | Hsien-Chuen Yu | 2006-03-21 |
| 6925082 | ATM packet access gateway | Rolfe E. Buhrke, Edward Clark, Ronald Davis, Shang-Fon Su, Margaret Hueying Yang +1 more | 2005-08-02 |
| 6404782 | Method and apparatus for signaling over packet-based systems | Alan D. Berenbaum, Hubert Rae McLellan, Jr. | 2002-06-11 |
| 5631903 | Telecommunications signaling arrangements for terminals without signaling capability | Roger Edward Libman, Suzanne Vondruska, Hsien-Chuen Yu | 1997-05-20 |
| 5280470 | Bandwidth and congestion management in accessing broadband | Rolfe E. Buhrke, Vikram Punj, Ronald A. Spanke, Nancy Stevens | 1994-01-18 |
| 5012466 | Call service initialization arrangement | Rolfe E. Buhrke, Leo R. Katzenstein, Michael McClurkan, John S. Tsai | 1991-04-30 |
| 4958343 | Communication channel reservation | Gabriela M. Abramovici, Rolfe E. Buhrke, Bopsi Chandramouli, Leo R. Katzenstein, Thomas M. O'Connor +2 more | 1990-09-18 |