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:
Aug. 05, 2008
Filed:
Sep. 06, 2002
Howard William Whitesmith, Cambridge, GB;
Richard Lew Davies, Bedfordshire, GB;
Andrew Jon Fell, Norfolk, GB;
Charles Robert Sims, Hertfordshire, GB;
Stephen Russell Taylor, Cambridge, GB;
Kenneth John Lang, Wilts, GB;
Howard William Whitesmith, Cambridge, GB;
Richard Lew Davies, Bedfordshire, GB;
Andrew Jon Fell, Norfolk, GB;
Charles Robert Sims, Hertfordshire, GB;
Stephen Russell Taylor, Cambridge, GB;
Kenneth John Lang, Wilts, GB;
Tagtec Limited, Willingham, Cambridge, GB;
Abstract
An RFID tag () and similar control/sensing unit () for a communications system are described. The control/sensing unit has a control element () having one or more states, and include an antenna () as well as an electrical circuit (-) generating a pulse control signal for controlling transmission from the antenna and varying a parameter of the pulse control signal in dependence on the state of the control element (). Also disclosed is a receiving communication unit in the form of a base unit or system controller for such a communications system, the unit including a receiver () for receiving a pulsed RF signal and an electrical circuit (-) for detecting a parameter of the pulsed RF signal. An output circuit () then produces an output control signal dependent on the detected parameter of the pulsed RF signal.