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:
Feb. 14, 1995
Filed:
Nov. 17, 1992
Shlomo Scop, Netanya, IL;
Shmuel Katar, Tnuvot, IL;
Motorola, Inc., Schaumburg, IL (US);
Abstract
In a radio frequency communication system, a primary unit interrogates a plurality of secondary units over a radio communication channel. The primary unit receives a command to initiate an interrogation cycle over the communication channel. The primary unit then selects a time delay from a set of time delays, and transmits an interrogation request to each secondary unit of at least a subset of the plurality of secondary units in series after the selected time delay if the channel is free at the end of the selected time delay. The primary unit then selects the longest time delay for the next interrogation cycle if a channel grant command is received, and selects a shorter time delay for the next interrogation cycle if no channel grant command is received.