Method and apparatus for midifying vintage organs and pianos
CA 2260251 A1 · Owner: Willis, Raymon A. · Inventors: Willis, Raymon A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for rejuvenating old keyboard instruments has an array of key sensor switches (KS) which are individually adjustable in a horizontal plane to accommodate varying angulations of the keys (K) behind the balance rail (20) of the keyboard and each key sensor switch (KS) includes a friction retained sensor probe (60) which enables a rapid and accurate accommodation of uneven keys.
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
- Filed July 14, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2019.
- 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.