System and method for locating individuals and equipment, airline reservation system, communication system
CA 2282376 C · Owner: Micron Communications, Inc. · Inventors: Tuttle, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for locating an individual in a facility the system comprising a , portable wireless transponder device borne by the individual; an interrogator; and a plurality of antennas distributed in the facility the antennas being , selectively separately connected to the interrogator the interrogator when , connected to any of the antennas having a communications range covering less than the area of the entire facility, the interrogator being configured to repeatedly transmit a wireless command to the portable wireless transponder device using alternating antennas, the portable wireless transponder device being configured to transmit data identifying the portable wireless transponder …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 10, 1998 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.