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. 14, 1999
Filed:
Nov. 22, 1995
Masato Yamagata, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A cordless telephone with no control channels which makes connection possible even when the handset or the base unit is within the area of another cordless telephone. When effecting connection between the handset and base unit through a pair of communication channels, connection request data is transmitted from one to the other of the handset and base unit by using one of a pair of communication channels paired with the other which is available as seen from the transmitting side. From the other side, on which the communication request data is received, data indicating whether the communication channel through which the connection request data has been transmitted is busy or not is sent. The transmission of connection request data is repeated through different communication channels until the data sent back indicates an available channel. When the data sent back indicates an available channel, connection is effected from then on between the handset and base unit through this available pair of channels.