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. 10, 1987
Filed:
May. 11, 1984
William Baker, Indianapolis, IN (US);
Michael K Pedigo, Southport, IN (US);
Noel Atkinson, Indianapolis, IN (US);
Henry P Shelton, Indianapolis, IN (US);
Southwestern Bell Telecommunications, Inc., St. Louis, MO (US);
Abstract
A cordless telephone system includes a control unit having a speaker, a microphone and control circuitry for selective operation in a 'normal' mode for communications between the handset and an outside party, a 'local answer' mode for communications between a party at the control unit and an outside party, an 'intercom' mode for communications between parties at the control unit and the handset and a '3-way' mode for communications between parties at the control unit and handset and an outside party. A microprocessor so responds to ring detect, control and switch-generated interrupt signals as to obtain the desired communications.