Assignee
ASTECH INC
US·7 granted patents·749 citations·filing 1976–1998
Top patents by PatentIndex Score
7 records- 0196US4475193APower line carrier multi telephone extension system for full duplex conferencing between telephonesASTECH INC·Filed 1982·Granted Oct 2, 1984·153 cites·33 claims
- 0294US4479033ATelephone extension system utilizing power line carrier signalsASTECH INC·Filed 1982·Granted Oct 23, 1984·125 cites·9 claims
- 0394US4058678ARemote signalling to a telephone line utilizing power line carrier signalsASTECH INC·Filed 1976·Granted Nov 15, 1977·107 cites·8 claims
- 0493US4495386ATelephone extension system utilizing power line carrier signalsASTECH INC·Filed 1983·Granted Jan 22, 1985·115 cites·4 claims
- 0591US4523307APower line carrier multi telephone extension system for full duplex conferencing and intercom between telephonesASTECH INC·Filed 1982·Granted Jun 11, 1985·127 cites·27 claims
- 0690US4514594APower line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capabilityASTECH INC·Filed 1982·Granted Apr 30, 1985·108 cites·19 claims
- 0739US6007029ABoiler tube alignment link systemASTECH INC·Filed 1998·Granted Dec 28, 1999·14 cites·8 claims
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