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:
Jan. 19, 1988
Filed:
Feb. 20, 1986
Sony Corporation, Tokyo, JP;
Abstract
In a telephone apparatus used for a telephone system such that the telephone set is connected to a remote destination telephone set through telephone circuits after an ID number of a subscriber has been transmitted to the telephone company, the handset comprises a key entry section including plural dial keys, a memory section for storing the ID number and destination telephone numbers, a display section for displaying a destination telephone number corresponding to an operated dial key, and a control section for enabling a display of the ID number when the ID number is written but disabling a display of the ID number when read. Since the ID number is not displayed while being read to transmit it to the telephone company, the ID number of the subscriber is kept secret from others.