Method and apparatus for real time localizing of mechanical items displaced by a step motor

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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

• Filed March 21, 1990 and granted March 22, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2010.
• A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.