Assignee

TRIGON ELECTRONICS INC

US·1 granted patent·6 citations·filing 2004–2004

Technology mixH02J1 H04M1

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1 record

0140US7259478B2Backup power supply for telephone setTRIGON ELECTRONICS INC·Filed 2004·Granted Aug 21, 2007·6 cites·20 claims

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