IP Library › Granted Patent US 4,335,416
Granted Patent Utility
US 4,335,416 · App. 06/234,209

Telephone protector module having flag indicator

Inventors: Thomas A. Hollfelder, Paul V. De Luca
Patented Case View Patent ↗
Granted: Jun 15, 1982 Filed: Feb 13, 1981
Inventors
Thomas A. Hollfelder
Paul V. De Luca
Assignee (at issue)
Porta Systems Corporation

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Quick Facts
Patent No.
US 4,335,416
App. No.
06/234,209
Filed
1981-02-13
Granted
1982-06-15
Kind
A