Disc cassette
CA 1319982 C · Owner: Beijersbergen Van Henegouwen, Cornelis Martin · Inventors: Ouwerkerk, Cornelis; Beijersbergen Van Henegouwen, Cornelis Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disc cassette", A cassette contains an information disc (1) arranged to be rotatable in the space inside the cassette and has an opening (9) in a main wall (3A) of the housing to provide access to the disc surface for a pick-up. In order to minimise the area of the opening (9) whilst, maintaining a wide field of use for the cassette the opening (9) is, arranged asymmetrically relative to a radius (10) of the disc (1). (Fig. 1).
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 July 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 6, 2010.
- 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.