IP Library › Granted Patent US 4,817,132
Granted Patent Utility
US 4,817,132 · App. 07/101,301

Multi-line access module for telephone set

Inventors: David B. Chamberlin, Nicholas A. D'Agosto, III, Ernest D. Hoffman
Patented Case View Patent ↗
Granted: Mar 28, 1989 Filed: Sep 25, 1987
Inventors
David B. Chamberlin
Nicholas A. D'Agosto, III
Ernest D. Hoffman
Assignee (at issue)
Dictaphone Corporation.

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Quick Facts
Patent No.
US 4,817,132
App. No.
07/101,301
Filed
1987-09-25
Granted
1989-03-28
Kind
A