American Telephone and Telegraph Company, AT&T Bell Laboratories
732Patents
2Active
732Granted
47Portfolio score
Filing activity: Mar 13, 1981 → Jun 29, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4686620A | Database backup method | Emerging Cross-Sectional Technologies | 1,382 | Expired |
| US4763317A | Digital communication network architecture for providing universal information services | Electricity | 522 | Expired |
| US4864824A | Thin film shape memory alloy and method for producing | Electricity | 411 | Expired |
| US4812217A | Method and apparatus for feeding and coating articles in a controlled atmosphere | Electricity | 331 | Expired |
| US4825354A | Method of file access in a distributed processing computer network | Emerging Cross-Sectional Technologies | 308 | Expired |
| US4840449A | Optical fiber splice organizer | Physics | 299 | Expired |
| US4899373A | Method and apparatus for providing personalized telephone subscriber features at remote locations | Emerging Cross-Sectional Technologies | 290 | Expired |
| US4851370A | Fabricating a semiconductor device with low defect density oxide | Electricity | 270 | Expired |
| US4788718A | Call data collection and modification of received call distribution | Electricity | 269 | Expired |
| US4763191A | Dial-up telephone network equipment for requesting an identified selection | Electricity | 268 | Expired |
| US4741038A | Sound location arrangement | Electricity | 264 | Expired |
| US4720850A | Communication system control arrangement | Electricity | 259 | Expired |
| US4789983A | Wireless network for wideband indoor communications | Electricity | 259 | Expired |
| US4835737A | Method and apparatus for controlled removal and insertion of circuit modules | Physics | 258 | Expired |
| US4769811A | Packet switching system arranged for congestion control | Electricity | 257 | Expired |
| US4725694A | Computer interface device | Emerging Cross-Sectional Technologies | 253 | Expired |
| US4783804A | Hidden Markov model speech recognition arrangement | Physics | 249 | Expired |
| US4878611A | Process for controlling solder joint geometry when surface mounting a leadless integrated circuit package on a substrate | Emerging Cross-Sectional Technologies | 244 | Expired |
| US4897867A | Method of and an arrangement for forwarding a customer order | Electricity | 237 | Expired |
| US4713806A | Communication system control arrangement | Electricity | 236 | Expired |
| US4730888A | Optimized guided wave communication system | Electricity | 227 | Expired |
| US4756020A | Method and apparatus for disallowing the extension of a call through a network | Electricity | 225 | Expired |
| US4682180A | Multidirectional feed and flush-mounted surface wave antenna | Electricity | 224 | Expired |
| US4861134A | Opto-electronic and optical fiber interface arrangement | Physics | 217 | Expired |
| US4872736A | Connector assembly having a latching mechanism | Physics | 211 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.