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. 18, 2009
Filed:
Oct. 12, 2004
Neil C Bird, Eindhoven, NL;
Paul R. Simons, Redhill, GB;
Neil C Bird, Eindhoven, NL;
Paul R. Simons, Redhill, GB;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method of indicating the location of a relatively mobile object, comprising the steps of: (a) generating a first signal that is characteristic of a first, relatively immobile object; (b) transmitting the first signal from the first relatively immobile object; (c) detecting the first signal at a receiver; (d) generating a second signal that is characteristic of a second, relatively immobile object; (e) transmitting the second signal from the second, relatively immobile object; (f) detecting the second signal at a receiver; (g) generating a third signal that is characteristic of the relatively immobile object; (h) detecting the third signal at a receiver; (i) operating a processing device operatively connected to the receiver using signal time-of-flight (t-o-f) data and/or received signal strength information (RSSI) to establish the distance of the relatively mobile object respectively from the first and second relatively immobile objects; and (j) generating a signal indicating whether the relatively mobile object is for the time being closer to the first or the second relatively immobile object as the case may be.