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Expired Canadian patentCanada

Axial tomographic apparatus

CA 1072222 A · Owner: Emi Limited · Inventors: Oliver, Colin C.

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

In a computerized tomographic radiographic apparatus a source directs a fan distribution of radiation through a patient to be detected by a bank of detector devices. The detector devices are disposed on a circular path centred on an axis about which the source orbits. The detectors are fixed relative to the body so that the radiation is incident on different detectors as the source orbits. Each detector devices receive radiation in different orientations, in the fan distribution at different, times.

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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

  • Granted February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 19, 1980
Term endedFebruary 19, 1997
Patent numberCA 1072222 A
Classification (IPC)H05G1/02

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedFeb 19, 1980Term endedFeb 19, 1997

Sources & verification

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