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Expired Canadian patentCanada

Network transit prevention

CA 1317015 C · Owner: Harper, John · Inventors: Harper, John; Miles, Kevin; Shand, Michael

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

15311-1442/PD88-0379, Abstract of the Disclosure In a digital communications network, means for preventing "transit" of data packets through a domain if such data packets neither originate within nor are addressed to a node within that domain. -?-

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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 April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 19, 1989
GrantedApril 27, 1993
Term endedApril 27, 2010
Patent numberCA 1317015 C
Classification (IPC)H04L12/46 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJuly 19, 1989Patent grantedApril 27, 1993Term endedApril 27, 2010

Sources & verification

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