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. 05, 1993
Filed:
Oct. 12, 1988
David N Critchlow, San Diego, CA (US);
Graham N Avis, San Diego, CA (US);
Sandra J Earlam, San Diego, CA (US);
Karle J Johnson, Carlsbad, CA (US);
Bruce A Smetana, Escondido, CA (US);
Gregory L Westling, Poway, CA (US);
Eric Paneth, Givataiim, IL;
Moshe Yehushua, San Diego, CA (US);
International Mobile Machines Corporation, King of Prussia, PA (US);
Abstract
In a wireless digital telephone system, a circuit for determining in a subscriber unit whether a particular RF channel is of the type designated by the base station to be either a control channel or a voice channel and for determining whether the channel is in the transmit or receive mode; the circuit utilizing the duration of an AM hole to determine the type of the channel and utilizing a unique word for determining the mode.