USD307274SExpiredUtility

Audio teleconference equipment with acoustic echo canceller

Assignee: NEC CORPPriority: Apr 27, 1988Filed: Oct 27, 1988Granted: Apr 17, 1990

Est. expiryApr 27, 2008(expired)· nominal 20-yr term from priority

PatentIndex Score

103

Cited by

References

Claims

exact text as granted — not AI-modified

An audio teleconference equipment with acoustic echo canceller, as shown.

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