High frequency device for applying symbols to protein-containing material
CA 1215130 A · Owner: Van Elsen, Johannes J.M. · Inventors: Van Elsen, Johannes J.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a device for applying symbols to protein-containing material. It is known to do this by means of electrically heated elements which burn the hide or flesh of an animal. According to the invention a high frequency between 2 and 22 MHz is used, the electromagnetic waves of which generate a change in the protein structure of the hide due to which in a, painless way, the colour is locally changed.
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 December 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 9, 2003.
- 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.