Assignee
XEL COMMUNICATIONS INC
US·12 granted patents·586 citations·filing 1989–1994
Top patents by PatentIndex Score
12 records- 0191US5606725ABroadband network having an upstream power transmission level that is dynamically adjusted as a function of the bit error rateXEL COMMUNICATIONS INC·Filed 1994·Granted Feb 25, 1997·279 cites·20 claims
- 0288US5488413ACATV telephony system using subsplit band for both directions of transmissionXEL COMMUNICATIONS INC·Filed 1994·Granted Jan 30, 1996·138 cites·22 claims
- 0370US5034978AUniversal channel unit switchable between two wire and four wire configurationsXEL COMMUNICATIONS INC·Filed 1989·Granted Jul 23, 1991·40 cites·22 claims
- 0459US5408524AAnswer supervision over pulse code modulated carrier system and method thereforeXEL COMMUNICATIONS INC·Filed 1993·Granted Apr 18, 1995·36 cites·17 claims
- 0547US5513173AData link access unit for T1 spans supporting the extended superframe format (ESF)XEL COMMUNICATIONS INC·Filed 1994·Granted Apr 30, 1996·18 cites·13 claims
- 0645US5151935AProgrammable universal signaling circuit for a telephone networkXEL COMMUNICATIONS INC·Filed 1990·Granted Sep 29, 1992·16 cites·11 claims
- 0745US5131033ASealing current generator for a telephone circuitXEL COMMUNICATIONS INC·Filed 1990·Granted Jul 14, 1992·18 cites·12 claims
- 0843US5140625ASystem for testing 2B1Q telephony loopback circuits and method thereforXEL COMMUNICATIONS INC·Filed 1991·Granted Aug 18, 1992·16 cites·9 claims
- 0939US5197068AIntra channel bank communication protocols between channels and the line interface unit of a telephone systemXEL COMMUNICATIONS INC·Filed 1990·Granted Mar 23, 1993·8 cites·12 claims
- 1032US5301187ASystem for implementing broadband audio program telephony circuits using 2B1Q technologyXEL COMMUNICATIONS INC·Filed 1993·Granted Apr 5, 1994·8 cites·18 claims
- 1130US5081670ASmart data station termination (DST) without active equalizersXEL COMMUNICATIONS INC·Filed 1991·Granted Jan 14, 1992·6 cites·22 claims
- 1227US5247574AAdaptive no balance DX signalling circuitXEL COMMUNICATIONS INC·Filed 1990·Granted Sep 21, 1993·3 cites·5 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →