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Expired Canadian patentCanada

A traffic control service assist system

CA 2201256 C · Owner: Tanaka, Seiichiro · Inventors: Shiomi, Kakuichi; Tanaka, Seiichiro; Kusui, Yoichi

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A plurality of control terminals are arranged to a plurality of control sections. Flight plan data of each control target aircraft is stored in a flight plan data management unit. The present positions of the control target aircraft are checked and acquired by an aircraft position information acquisition unit. The control states of the control target aircraft are managed by a control progress information management unit. The history of control of each control target aircraft is stored in a control progress information storage unit. A control target aircraft prediction unit predicts control target aircraft after a predetermined time on the basis of the control progress information and flight …

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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 March 27, 1997 and granted February 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 27, 1997
GrantedFebruary 6, 2001
Term endedMarch 27, 2017
Patent numberCA 2201256 C
Classification (IPC)G08G5/00 +1 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedMarch 27, 1997Patent grantedFeb 6, 2001Term endedMarch 27, 2017

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.