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:
Nov. 03, 1981
Filed:
May. 02, 1979
Applicant:
Inventor:
Julius Jusinskas, Jr, Glen Ellyn, IL (US);
Assignee:
GTE Automatic Electric Labs Inc., Northlake, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ; H04M / ;
U.S. Cl.
CPC ...
179 / ; 179 / ;
Abstract
A telephone call waiting signal system as used in a processor controlled exchange, wherein reuse is made of an existing ringing supply bus and the signal relay in each subscriber's line equipment for applying a call waiting signal to the subscriber's line. This is made possible by the multiplexing of the two signals and selectively operating the signal relay at the line equipment.
Jusinskas, Jr, Julius. (1981). Call waiting signal arrangement (U.S. Patent No. 4298774). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4298774
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile