Apparatus and method for monitoring an article dispensing device such as a seed planter and the like
CA 2176265 C · Owner: Mcenaney, Kevin P. · Inventors: Landers, David J.; Holmstrom, Scott A.; Miller, Gregry C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for accurately counting the number of articles passing along an article path. A light beam is transmitted across an article path to a sensor which light beam is interfered with by the passage of articles along the article path and the received light beam is converted to electrical signals that are conditioned amplified and input to a logic unit which based on derived amplitude, duration and area of the input signals determines the number of articles that passed along the article path. A system is also described which accurately counts the number of articles passing along a plurality of article paths by employing a plurality of such devices each of which accurately …
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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 May 10, 1996 and granted July 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2018.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.