IP Library › Granted Patent US 4,680,783
Granted Patent Utility
US 4,680,783 · App. 06/808,978

Telephone security violation detection device

Inventor: Eduard F. B. Boeckmann
Patented Case View Patent ↗
Granted: Jul 14, 1987 Filed: Dec 16, 1985
Inventor
Eduard F. B. Boeckmann
Assignee (at issue)
GTE Communication Systems Corporation

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Quick Facts
Patent No.
US 4,680,783
App. No.
06/808,978
Filed
1985-12-16
Granted
1987-07-14
Kind
A