The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1976
Filed:
Mar. 27, 1975
Gerry Christian Balzer, Freehold, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A call denial circuit for use in a key telephone system is arranged to operate in response to a communication line reversal from the central office to create a timed interval during which the A leads from the associated key stations are observed. If any station having unrestricted capability is off-hook and active during the timed interval, the call denial circuit is inhibited and the call proceeds in the normal manner. At the expiration of the timed interval the call may continue even though only restricted stations remain on the established connection. The circuit is arranged so that a station may have some lines which are restricted and some lines which are unrestricted.