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Expired Canadian patentCanada

Lead computing devices

CA 505357 A · Owner: Massachusetts Institute Of Technology · Inventors: Edward P. Bentley; Charles S. Draper

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

No Claude kit for weapons

Claude doesn't help design weapons, ammunition or explosives, so this page has no Reinvent kit. To develop this one, work with a federally licensed manufacturer (many of these items are regulated) and a registered patent attorney or agent, listed on the USPTO roster.

Read the whole patent

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.

Why it's free to use

  • Granted August 24, 1954. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 1971.
  • 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—
GrantedAugust 24, 1954
Term endedAugust 24, 1971
Patent numberCA 505357 A
Classification (IPC)F41A27/00

Timeline

Timeline From CIPO dates

195519571959196119631965196719691971Patent grantedAug 24, 1954Term endedAug 24, 1971

Sources & verification

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