Optical scanning arrangement and article useful therewith
CA 1075815 A · Owner: Rca Corporation · Inventors: Nickl, Franklyn G.; Schanne, Joseph F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article of manufacture to be read by optical scanning equipment comprising an information medium on which are a plurality of concentric annuli in two optically contrasting colors representing binary ones and binary zeroes, the pattern of ones and zeroes differing on either side of an imaginary diameter line.
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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 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.