Model gun with automatic bullet supplying mechanism
CA 2257729 C · Owner: Kunimoto, Keiichi · Inventors: Kunimoto, Keiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A model gun with automatic bullet supplying mechanism comprises a pressure accumulating chamber from which a gas leading passage extends, a slider movable along a barrel structure a pressure receiving, portion fixed in the slider at the back of the barrel structure a, movable member provided with first and second inner spaces and arranged at the back of a bullet holding chamber and a movable valve provided in, the first inner space formed in the movable member. The movable valve is operative selectively, during a period in which the gas leading passage is connected with the first and second inner spaces formed in the movable member, to cause gas derived through the gas leading passage from …
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
- Filed January 6, 1999 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.