Bowling pin sensor
CA 1288448 C · Owner: Schwiering, Werner F.W. · Inventors: England, Thomas G.; Schwiering, Werner F.W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inventors: Werner F. W. Schwiering Thomas G. England, ABSTRACT OF THE DISCLOSURE A sensor for use in a lane of a bowling centre to detect the relative position of a bowling pin comprising a light, responsive electrical device with a superimposed light conductive protector, the light conductive protective means having a refractive index and a length/diameter ratio whereby light entering therein will reach the light responsive electrical means only below a predetermined angle of incidence.
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 September 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2008.
- 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.