Limited play tape cassette system
CA 1282764 C · Owner: Rubenstein, David H. · Inventors: Nicholson, Roger D.; Perkins, Leland M.; Rubenstein, David H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An assembly added to a conventional VHS cassette provides a wheel for counting the number of plays or replays of segments, of more than a predetermined length and preventing further, replay after the last authorized play by either releasing a spring biased arm to carry an erase head against the tape or, locking the cassette brakes in the engaged position once the cassette is removed from the tape deck.
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 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 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.