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:
Jun. 09, 1998
Filed:
Jun. 08, 1995
Bryan Taylor, Waterloo, CA;
Mihal Lazaridis, Waterloo, CA;
Peter Edmonson, Hamilton, CA;
Perry Jarmuszewski, Guelph, CA;
Lizhong Zhu, Waterloo, CA;
Steven Carkner, Waterloo, CA;
Matthias Wandel, Waterloo, CA;
Research In Motion Limited, Waterloo, CA;
Abstract
A wireless radio modem that may be incorporated into a host system or connected through a PCMCIA or similar port to a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimizes the RF interference between the radio modem and the host system. Radio modem power conservation is maximized by 1) simplifying signal modulation processing by use of a two-point waveform transition table, thereby reducing processing requirements; and 2)incorporating a 'sleep mode' feature in which all non-timer circuitry is powered-down when not in use.