Air horn
CA 1091489 A · Owner: Midland-Ross Corporation · Inventors: Palm, Walter C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Air Horn, Abstract of the Disclosure, A springless diaphragm-type air horn provided with fixed structure for controlling the amplitude of diaphragm oscillation to thereby enable manufacturing of the horn without necessity for any adjustment of parts to achieve tone 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, and the Claude kit works from them.
Why it's free to use
- Granted December 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 1997.
- 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.