IP Library › Granted Patent US 5,054,021
Granted Patent Utility
US 5,054,021 · App. 07/490,092

Circuit for nulling the talker's speech in a conference call and method thereof

Inventor: David C. Epps
Patented Case View Patent ↗
Granted: Oct 1, 1991 Filed: Mar 6, 1990
Inventor
David C. Epps
Assignee (at issue)
ConferTech International, Inc.

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Quick Facts
Patent No.
US 5,054,021
App. No.
07/490,092
Filed
1990-03-06
Granted
1991-10-01
Kind
A