AT&T Bell Laboratories
3,366Patents
17Active
3,366Granted
49Portfolio score
Filing activity: Jan 5, 1979 → Mar 23, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5206903A | Automatic call distribution based on matching required skills with agents skills | Electricity | 793 | Expired |
| US5013691A | Anisotropic deposition of silicon dioxide | Emerging Cross-Sectional Technologies | 784 | Expired |
| US5329589A | Mediation of transactions by a communications system | Electricity | 671 | Expired |
| US5301286A | Memory archiving indexing arrangement | Emerging Cross-Sectional Technologies | 594 | Expired |
| US4555775A | Dynamic generation and overlaying of graphic windows for multiple active program storage areas | Physics | 539 | Expired |
| US5311594A | Fraud protection for card transactions | Emerging Cross-Sectional Technologies | 435 | Expired |
| US5212752A | Optical fiber ferrule connector having enhanced provisions for tuning | Physics | 402 | Expired |
| US5195086A | Multiple call control method in a multimedia conferencing system | Emerging Cross-Sectional Technologies | 392 | Expired |
| US5227878A | Adaptive coding and decoding of frames and fields of video | Electricity | 387 | Expired |
| US4850007A | Telephone toll service with advertising | Electricity | 381 | Expired |
| US4611094A | Method for customer definable telephone capability | Emerging Cross-Sectional Technologies | 371 | Expired |
| US5327421A | Apparatus for interfacing between telecommunications call signals and broadband signals | Electricity | 370 | Expired |
| US5285513A | Optical fiber cable provided with stabilized waterblocking material | Physics | 358 | Expired |
| US5129030A | Movable lightguide connector panel | Physics | 357 | Expired |
| US5020112A | Image recognition method using two-dimensional stochastic grammars | Physics | 345 | Expired |
| US5345446A | Establishing telecommunications call paths in broadband communication networks | Electricity | 340 | Expired |
| US5274729A | Universal optical fiber buildout system | Physics | 331 | Expired |
| US5345445A | Establishing telecommunications calls in a broadband network | Electricity | 317 | Expired |
| US5115309A | Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders | Electricity | 315 | Expired |
| US5089442A | Silicon dioxide deposition method using a magnetic field and both sputter deposition and plasma-enhanced CVD | Electricity | 314 | Expired |
| US5136671A | Optical switch, multiplexer, and demultiplexer | Physics | 313 | Expired |
| US5305312A | Apparatus for interfacing analog telephones and digital data terminals to an | Electricity | 312 | Expired |
| US5186647A | High frequency electrical connector | Emerging Cross-Sectional Technologies | 311 | Expired |
| US4613990A | Radiotelephone transmission power control | Electricity | 308 | Expired |
| US5172213A | Molded circuit package having heat dissipating post | Electricity | 306 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.