Adtran, Inc.
🏢 View company profile →540Patents
340Active
540Granted
57Portfolio score
Filing activity: Oct 1, 1987 → Jul 18, 2023 · 109 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9603277B2 | Field-reconfigurable backplane system | Electricity | 226 | Active |
| US5856758A | Low distortion driver employing positive feedback for reducing power loss in output impedance that effectively matches the impedance of driven line | Electricity | 115 | Expired |
| US5875202A | Transmission of encoded data over reliable digital communication link using enhanced error recovery mechanism | Electricity | 110 | Expired |
| US5809033A | Use of modified line encoding and low signal-to-noise ratio based signal processing to extend range of digital data transmission over repeaterless two-wire telephone link | Electricity | 105 | Expired |
| US5943404A | Mechanism for providing emergency POTS service in event of loss of power to customer premises equipment for | Electricity | 92 | Expired |
| US6584197B1 | Power-limited remote termination converter with wetting current and emergency power operation for digital data transmission equipment | Emerging Cross-Sectional Technologies | 86 | Expired |
| US5771236A | Method for increasing | Electricity | 70 | Expired |
| US6246716A | Information communication system | Electricity | 70 | Expired |
| US6687235B1 | Mitigation of non-linear signal perturbations using truncated volterra-based non-linear echo canceler | Electricity | 66 | Expired |
| US5414733A | Decision feedback equalizer employing fixed ratio postcursor taps for minimizing noise and intersymbol interference in signals conveyed over high speed data service loop | Electricity | 65 | Expired |
| US5903572A | ISDN terminal adapter for use with external modem and employing software-based serial communication framing for ISDN `D` channel signaling | Electricity | 61 | Expired |
| US5774316A | Ground fault detector for line-powered telephone network | Electricity | 60 | Expired |
| US5561687A | Decision feedback equalizer employing fixed ratio postcursor taps for minimizing noise and intersymbol interference in signals conveyed over high speed data service loop | Electricity | 58 | Expired |
| US6489755B1 | Active ripple and noise filter for telecommunication equipment powering | Electricity | 58 | Expired |
| US6628621B1 | Multichannel-capable bit error rate test system | Electricity | 53 | Expired |
| US5327433A | Digital tandem channel unit interface for telecommunications network | Electricity | 51 | Expired |
| US6934345B2 | Apparatus, method and system for correlated noise reduction in a trellis coded environment | Electricity | 51 | Expired |
| US5909445A | Mechanism for transporting digital pots signals within framing structure of high bit rate digital local subscriber loop signals | Emerging Cross-Sectional Technologies | 51 | Expired |
| US10044646B1 | Systems and methods for efficiently storing packet data in network switches | Electricity | 49 | Active |
| US6757382B1 | Quasi ground fault interruption signal-based activation of emergency pots by-pass paths for line-powered digital subscriber loop | Electricity | 48 | Expired |
| US6259680A | Method and apparatus for echo cancellation | Electricity | 47 | Expired |
| US6876736B2 | Call-routing mechanism for automatically performing number substitution in an integrated access device | Electricity | 47 | Expired |
| US6580254B2 | Apparatus and method for providing span power to communication equipment at a customer premise | Electricity | 46 | Expired |
| US7375940B1 | Transformer interface for preventing EMI-based current imbalances from falsely triggering ground fault interrupt | Electricity | 41 | Active |
| US6356560B1 | Arbitration mechanism for statistically multiplexed frame relay switching system | Electricity | 40 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.