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DUFFY DENNIS
US3 patents
Top patents by PatentIndex Score
US8340085B2Dec 25, 2012
Method and apparatus for enabling customer premise public branch exchange service feature processing
DUFFY DENNIS1 citations58
US8625579B2Jan 7, 2014
Method and apparatus for enabling customer premise public branch exchange service feature processing
DUFFY DENNIS0 citations48
US8570884B2Oct 29, 2013
Method and apparatus for enabling customer premise public branch exchange service feature processing
DUFFY DENNIS0 citations48