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Sol Farber
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Newton, MA, US
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last 30 patents
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Patent Grant
ISDN disconnect alarm generation tool for use in voice over IP (VoI...
Patent number
8,375,121
Issue date
Feb 12, 2013
Level 3 Communications, LLC
Fred R. Ziegler
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ISDN disconnect alarm generation tool for use in voice over IP (VoI...
Patent number
7,051,099
Issue date
May 23, 2006
Level 3 Communications, Inc.
Fred R. Ziegler
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
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Patent Application
ISDN disconnect alarm generation tool for use in Voice over IP (VoI...
Publication number
20060230143
Publication date
Oct 12, 2006
Fred R. Ziegler
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ISDN disconnect alarm generation tool for use in voice over IP (VoI...
Publication number
20030023714
Publication date
Jan 30, 2003
Fred R. Ziegler
H04 - ELECTRIC COMMUNICATION TECHNIQUE