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:
Dec. 07, 1999
Filed:
Feb. 08, 1993
Applicant:
Inventor:
Yoshihiro Tanigawa, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ; H04M / ; H04J / ;
U.S. Cl.
CPC ...
379201 ; 370522 ; 370524 ; 379208 ; 379230 ; 379234 ; 379241 ;
Abstract
A telephone exchange apparatus having a memory for storing the status information of extensions and outside lines. Upon reception of a predetermined setup message from an extension ISDN telephone, if there is a held line, the apparatus connects the line with the extension ISDN telephone which has transmitted the setup message. Thus an extension ISDN telephone can respond to a held call.
Tanigawa, Yoshihiro. (1999). Telephone exchange apparatus having an integrated services digital (U.S. Patent No. 5999608). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5999608
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