Nortel Networks Limited
6,462Patents
538Active
6,462Granted
50Portfolio score
Filing activity: Dec 16, 1974 → Apr 8, 2011 · 538 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6310610A | Intelligent touch display | Physics | 1,855 | Expired |
| US5329578A | Personal communication service with mobility manager | Electricity | 851 | Expired |
| US6026375A | Method and apparatus for processing orders from customers in a mobile environment | Physics | 808 | Expired |
| US5610910A | Access to telecommunications networks in multi-service environment | Electricity | 700 | Expired |
| US6658095B1 | Customized presence information delivery | Electricity | 691 | Expired |
| US6092196A | HTTP distributed remote user authentication system | Physics | 679 | Expired |
| US6505046B1 | Method and apparatus for distributing location-based messages in a wireless communication network | Electricity | 678 | Expired |
| US6286038A | Method and apparatus for remotely configuring a network device | Electricity | 654 | Expired |
| US6816578B1 | Efficient instant messaging using a telephony interface | Electricity | 528 | Expired |
| US5982324A | Combining GPS with TOA/TDOA of cellular signals to locate terminal | Electricity | 439 | Expired |
| US5353367A | Distribution frame and optical connector holder combination | Physics | 431 | Expired |
| US6330602A | Scaleable web server and method of efficiently managing multiple servers | Electricity | 424 | Expired |
| US6333973A | Integrated message center | Electricity | 424 | Expired |
| US5455888A | Speech bandwidth extension method and apparatus | Physics | 421 | Expired |
| US5857020A | Timed availability of secured content provisioned on a storage medium | Physics | 418 | Expired |
| US6631122B1 | Method and system for wireless QOS agent for all-IP network | Electricity | 416 | Expired |
| US7227937B1 | Monitoring natural interaction for presence detection | Electricity | 405 | Expired |
| US6243581A | Method and system for seamless roaming between wireless communication networks with a mobile terminal | Emerging Cross-Sectional Technologies | 403 | Expired |
| US7092696B1 | Accounting method and apparatus for communications network | Electricity | 400 | Expired |
| US6625258B1 | System and method for providing unified communication services support | Electricity | 397 | Expired |
| US6324271A | System and method for authentication of caller identification | Electricity | 396 | Expired |
| US5583359A | Capacitor structure for an integrated circuit | Electricity | 388 | Expired |
| US6680934B1 | System, device and method for expediting control flow in a communication system | Electricity | 383 | Expired |
| US6098065A | Associative search engine | Emerging Cross-Sectional Technologies | 383 | Expired |
| US6271835A | Touch-screen input device | Physics | 369 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.