Universal Data Systems, Inc.
38Patents
0Active
38Granted
36Portfolio score
Filing activity: May 11, 1979 → Oct 7, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4417099A | Electro-optical isolator circuit for line powered modem | Electricity | 136 | Expired |
| US5224154A | Line powered DCA including dual programmed microcontrollers | Electricity | 107 | Expired |
| US4578533A | Switchable line powered modem | Electricity | 97 | Expired |
| US4395590A | Line powered modem | Electricity | 86 | Expired |
| US4621366A | Modem equalizer training using previously stored parameters | Electricity | 72 | Expired |
| US4415774A | Line powered modem automatic answer device powered from equipment | Electricity | 60 | Expired |
| US4373117A | DC to DC converter for line powered modem | Electricity | 54 | Expired |
| US5307351A | Data communication apparatus for adjusting frame length and method of operating same | Electricity | 50 | Expired |
| US4956852A | Method for remote configuration of a modem | Emerging Cross-Sectional Technologies | 48 | Expired |
| USD351841S | Handheld portable modem | General | 48 | Expired |
| US4970715A | Modem with improved remote echo location and cancellation | Electricity | 47 | Expired |
| US5222081A | Method of performing an autobaud function using a state flow machine | Electricity | 47 | Expired |
| US5490169A | Decision feedback equalizer method and apparatus | Electricity | 46 | Expired |
| US4939623A | Modem with improved transformer assembly | Electricity | 42 | Expired |
| USD262106S | Data modem | General | 31 | Expired |
| US4263670A | Microprocessor data modem | Electricity | 28 | Expired |
| US4852122A | Modem suited for wireless communication channel use | Electricity | 27 | Expired |
| US5228064A | Data timing recovery apparatus and method | Electricity | 27 | Expired |
| US4606051A | QPSK demodulator with I and Q post-detection data correction | Electricity | 19 | Expired |
| US5148435A | Testable modem and data communications network | Physics | 18 | Expired |
| US5367534A | Synchronous flow control method | Electricity | 14 | Expired |
| US5309481A | Apparatus for adjusting signal points, equalizer coefficients and the like | Electricity | 13 | Expired |
| US5365545A | MODEM-channel bank converter | Electricity | 13 | Expired |
| US5280473A | Modem with echo cancellation | Electricity | 11 | Expired |
| US5245556A | Adaptive equalizer method and apparatus | Electricity | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.