Assignee
TRELL ANDERS E
SE·3 granted patents·31 citations·filing 1988–1989
Technology mixH04M3
Top patents by PatentIndex Score
3 records- 0156US5046083AEntrance communication systemTRELL ANDERS E·Filed 1989·Granted Sep 3, 1991·16 cites·17 claims
- 0248US4987589AEntrance telephone system utilizing the public subscriber telephone networkTRELL ANDERS E·Filed 1989·Granted Jan 22, 1991·11 cites·12 claims
- 0335US4872194AMethod for transmission of alarm signals utilizing an entrance telephone systemTRELL ANDERS E·Filed 1988·Granted Oct 3, 1989·4 cites·4 claims
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