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Expired Canadian patentCanada

Human identification system

CA 1234428 A · Owner: Exact-I-Dent, Inc. · Inventors: Elggren, Richard W.

CIPO record

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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 device and method for applying and retaining a unique data carrier to a tooth surface of an individual. The data carrier comprises a thin sheet of material having a data format unique to the individual. This data carrier is attached to the surface of the individual's tooth and is adapted for detection by a reader which can be operated by a third person. All phases of installation and detection of the carrier involve passive, noninvasive techniques which can be applied without regard to age and can be maintained as part of a permanent identification system. The system further comprises a central data bank which becomes a verification source for identifying information carried at the …

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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 March 22, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 22, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 16, 1984
GrantedMarch 22, 1988
Term endedMarch 22, 2005
Patent numberCA 1234428 A
Classification (IPC)A61B90/94 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedNov 16, 1984Patent grantedMarch 22, 1988Term endedMarch 22, 2005

Sources & verification

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