Passage device for cattle
CA 1295895 C · Owner: Harmsen, Jan Hendrik · Inventors: Harmsen, Jan Hendrik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: A passage device for cattle. ABSTRACT A passage device for cattle comprising an opening closable by two doors hinged around vertical pins on either side of the opening, in which as viewed from the space accessible via the passage device one door is openable only outwardly and the other door only inwardly.
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, and the Claude kit works from them.
Why it's free to use
- Granted February 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 2009.
- 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.