Igniting apparatus for explosive substances
CA 2029677 C · Owner: Kunitomo, Shigeaki · Inventors: Kunitomo, Shigeaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordNo Claude kit for weapons
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Abstract From the Canadian patent
A program-controlled automatic ignition apparatus comprises a plurality of ignition circuits for igniting explosive charges, a plurality of terminal control units disposed in proximity to a location where the explosive charges are set, for managing divided groups of the ignition circuits, and controlling them individually while, monitoring the loaded state of the explosive charges in the circuits, a central control unit for controlling the ignition circuits through the terminal control units according to a preset program so as to successively ignite the explosive charges, and an interface unit for transmitting instructions from the central control unit to the individual terminal control …
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 November 9, 1990 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2012.
- 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.