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. 05, 1984
Filed:
Dec. 23, 1982
Applicant:
Inventors:
Ann L Wolf, Pinellas Park, FL (US);
John G Wagoner, St. Petersburg, FL (US);
Assignee:
GTE Automatic Electric Inc., Northlake, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
179 / ; 179 / ; 1791 / ;
Abstract
A circuit which locks the signaling circuit of a telephone station. A microprocessor disconnects a keypad from an associated tone generator upon detection of operation of a lock button. The microprocessor connects the keypad to the tone generator upon detection of operation of the lock button and a predetermined unlock code provided by the keypad.