AT&T Laboratories
28Patents
1Active
28Granted
36Portfolio score
Filing activity: Mar 5, 1982 → Aug 5, 2005 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4554515A | CMOS Operational amplifier | Electricity | 218 | Expired |
| US5327515A | Method for forming a Bragg grating in an optical medium | Physics | 91 | Expired |
| US5385632A | Method for manufacturing integrated semiconductor devices | Emerging Cross-Sectional Technologies | 89 | Expired |
| US4464658A | Multipoint data communication system with collision detection | Electricity | 84 | Expired |
| US4493077A | Scan testable integrated circuit | Electricity | 70 | Expired |
| US5281301A | Alignment and assembly method | Physics | 49 | Expired |
| US5093913A | Multiprocessor memory management system with the flexible features of a tightly-coupled system in a non-shared memory system | Physics | 40 | Expired |
| US5346775A | Article comprising solder with improved mechanical properties | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5158136A | Pin fin heat sink including flow enhancement | Electricity | 37 | Expired |
| US5064685A | Electrical conductor deposition method | Chemistry; Metallurgy | 32 | Expired |
| US5235669A | Low-delay code-excited linear-predictive coding of wideband speech at 32 kbits/sec | Physics | 28 | Expired |
| US4558444A | Switching system having selectively interconnected remote switching modules | Electricity | 25 | Expired |
| US5081075A | Method of producing a superconductive body, and apparatus and systems comprising the body | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5285511A | Optoelectronic cable connector | Electricity | 18 | Expired |
| US5172259A | Embedded control network | Electricity | 15 | Expired |
| US4645687A | Deposition of III-V semiconductor materials | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4572972A | CMOS Logic circuits with all pull-up transistors integrated in separate chip from all pull-down transistors | Electricity | 13 | Expired |
| US4865408A | Low crosstalk reversed .DELTA..beta. electrodes for directional coupler switch | Physics | 12 | Expired |
| USD323489S | Portable terminal for smart cards | General | 9 | Expired |
| US8073994B2 | Data transfer, synchronising applications, and low latency networks | Electricity | 7 | Active |
| US4654111A | Hydrothermal growth of potassium titanyl phosphate | Chemistry; Metallurgy | 6 | Expired |
| US4568982A | Optical scanning method and apparatus | Electricity | 5 | Expired |
| USD339328S | Mini-computer housing | General | 5 | Expired |
| US5288572A | Method for monitoring photoresist latent images | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4492652A | Reactions of aromatic compounds having two or more fused rings | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.