Magnetic tape cassette having dynamic tape guide
CA 2031387 C · Owner: Yanaka, Kiyotaka · Inventors: Tanaka, Masato; Yanaka, Kiyotaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The magnetic tape cassette of the present invention has the opening portion into which the head drum having the rotary head is inserted. The pair of tape guide members which guide the tape-like record medium so that the record medium is helically wrapped around the head drum are provided in the inside of the opening portion so as to be able to swing independently. Thus when the head drum is inserted into the opening portion the two, tape guide members are brought in circumferential contact with the peripheral surface of the head drum accurately. Therefore the, recording and/or reproduction can be reliably carried out which, can increase reliability of the magnetic tape cassette.
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 December 3, 1990 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2012.
- 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.