Racal Data Communications, Inc.
75Patents
0Active
75Granted
39Portfolio score
Filing activity: May 19, 1981 → Jul 26, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5159685A | Expert system for communications network | Emerging Cross-Sectional Technologies | 211 | Expired |
| US4385384A | Modem diagnostic and control system | Electricity | 208 | Expired |
| US5063523A | Network management system with event rule handling | Electricity | 204 | Expired |
| US4797898A | Method and apparatus for equalization of data transmission system | Electricity | 140 | Expired |
| US4700341A | Stochastic time division multiplexing | Electricity | 120 | Expired |
| US5119403A | Superframes | Electricity | 104 | Expired |
| US4891806A | Constellation multiplexed inband secondary channel for voiceband modem | Electricity | 104 | Expired |
| US4646061A | Data communication with modified Huffman coding | Physics | 89 | Expired |
| US4805215A | Adaptive echo canceller with sparse dynamically positioned taps | Electricity | 87 | Expired |
| US4937844A | Modem with data compression selected constellation | Electricity | 84 | Expired |
| US4652703A | Digital voice transmission having improved echo suppression | Electricity | 82 | Expired |
| US4998243A | ISDN terminal adapter with teleconference provision | Electricity | 81 | Expired |
| US4858070A | Modular expandable housing arrangement for electronic apparatus | Emerging Cross-Sectional Technologies | 79 | Expired |
| US4780883A | Data modem with adaptive synchronized speed change | Electricity | 78 | Expired |
| US5177739A | Multiport - multipoint digital data service | Electricity | 74 | Expired |
| US4924456A | High speed modem | Emerging Cross-Sectional Technologies | 74 | Expired |
| US4652969A | Secure universal housing arrangement for enclosing electronic circuits | Electricity | 72 | Expired |
| US4817865A | Ventilation system for modular electronic housing | Electricity | 71 | Expired |
| US4748626A | Viterbi decoder with reduced number of data move operations | Electricity | 61 | Expired |
| US4891805A | Multiplexer with dynamic bandwidth allocation | Electricity | 60 | Expired |
| US4601044A | Carrier-phase adjustment using absolute phase detector | Electricity | 57 | Expired |
| US4641302A | High speed packet switching arrangement | Electricity | 54 | Expired |
| US4434322A | Coded data transmission system | Electricity | 52 | Expired |
| US4700175A | Data communication with modified Huffman coding | Physics | 50 | Expired |
| US4965804A | Key management for encrypted packet based networks | Electricity | 50 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.