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Expired Canadian patentCanada

Electronic imaging copier

CA 1251511 A · Owner: Polaroid Corporation · Inventors: Norris, Philip R.

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

Title: ELECTRONIC IMAGING COPIER, ABSTRACT OF THE DISCLOSURE An electronic imaging copier is provided for making enhanced photographic copies of reflection print and transparency types of photographs. An optical image of an original print or transparency is scanned twice to provide first and second sets of image signals representative of low and higher resolution versions of the image. At least a portion of the low resolution first set of signals is employed to provide a preview display of the image. The first and second sets of signals are processed to provide a third set of signals representative of an enhanced version of the image which is projected onto a film unit to provide 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 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
  • 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 20, 1986
GrantedMarch 21, 1989
Term endedMarch 21, 2006
Patent numberCA 1251511 A
Classification (IPC)H04N1/38 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedNov 20, 1986Patent grantedMarch 21, 1989Term endedMarch 21, 2006

Sources & verification

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