AT & T IPM Corp.
91Patents
0Active
91Granted
41Portfolio score
Filing activity: Jul 31, 1991 → Apr 21, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5461390A | Locator device useful for house arrest and stalker detection | Electricity | 577 | Expired |
| US5463388A | Computer mouse or keyboard input device utilizing capacitive sensors | Physics | 397 | Expired |
| US5461217A | Secure money transfer techniques using smart cards | Physics | 368 | Expired |
| US5442625A | Code division multiple access system providing variable data rate access to a user | Electricity | 339 | Expired |
| US5459304A | Smart card techniques for motor vehicle record administration | Physics | 316 | Expired |
| US5463620A | Bandwidth allocation, transmission scheduling, and congestion avoidance in broadband asynchronous transfer mode networks | Electricity | 315 | Expired |
| US5490229A | Slidably mounted optical fiber distribution tray | Physics | 311 | Expired |
| US5448675A | Telecommunications distribution frame with tracing | Electricity | 201 | Expired |
| US5459727A | Wireless telecommunication system | Electricity | 140 | Expired |
| US5487111A | Telecommunications system sequence calling | Electricity | 116 | Expired |
| US5457684A | Delay-less signal processing arrangement for use in an ATM network | Electricity | 106 | Expired |
| US5459722A | Asynchronous transfer mode (ATM) transport of voice-band signals | Electricity | 102 | Expired |
| US5457495A | Adaptive video coder with dynamic bit allocation | Electricity | 99 | Expired |
| US5461690A | Bend-limiting apparatus for a cable | Physics | 98 | Expired |
| US5457760A | Wavelength division optical multiplexing elements | Electricity | 98 | Expired |
| US5459780A | Work at home agent ACD call distribution | Electricity | 92 | Expired |
| US5461693A | Optical fiber distribution frame with fiber testing | Electricity | 90 | Expired |
| US5457709A | Unipolar semiconductor laser | Electricity | 90 | Expired |
| US5459779A | Method for switching telephone calls to information service providers | Electricity | 83 | Expired |
| US5457704A | Post processing method and apparatus for symbol reliability generation | Electricity | 81 | Expired |
| US5471500A | Soft symbol decoding | Electricity | 79 | Expired |
| US5450449A | Linear prediction coefficient generation during frame erasure or packet loss | Physics | 73 | Expired |
| US5463675A | Extended home indentification being used by the same service provider as a home identification in a service area other than the home service area for cellular radio telephone systems | Electricity | 71 | Expired |
| US5457620A | Current estimating circuit for switch mode power supply | Physics | 70 | Expired |
| US5461379A | Digital coding technique which avoids loss of synchronization | Physics | 69 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.