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:
Mar. 08, 1994
Filed:
Apr. 29, 1992
Masahiro Hirano, Saitama, JP;
Pioneer Electronic Corp., Tokyo, JP;
Pioneer Communications Corp., Saitama, JP;
Abstract
A simultaneous voice-call system for a cordless telephone where communication between a base unit and a plurality of portable units is established through the use of a radio communication channel. The base unit includes a transmitter/receiver which establishes a communication channel between base unit and plurality of portable units. The transmitter/receiver has a control channel and a plurality of talk channels. A portable-unit-identifying number memory stores portable-unit-identifying numbers preassigned to the plurality of portable units. A first simultaneous call controller responsive to a simultaneous call command from a user to establish a talk-channel between the plurality of portable units by transmitting through the control channel portable-unit-identifying numbers stored in the portable-unit-identifying number memory, a vacant-talk-channel number, and a simultaneous call code to the plurality of portable units. The talk-channel is a radio communication channel through which a message is transmitted from the base unit to the plurality of portable units. The simultaneous call code indicates that the message is transmitted to the portable units at the same time. Each of the plurality of portable units includes a portable-unit-identifying number assigned thereto and a second simultaneous call controller.