Magnetic-tape cassette
CA 2019371 A1 · Owner: N.V. Philips' Gloeilampenfabrieken · Inventors: Vollmann, Norbert-Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 12.996 01.06.1990, ABSTRACT:, "Magnetic-tape cassette" A magnetic-tape-cassette (1) comprises tape guides (34 35), which are arranged on a resilient element (40) and is constructed for cooperation with an apparatus (2) comprising a magnetic-head unit (4) and further tape guides (6, 7). During cooperation with the apparatus (2) the tape guides (34, 35) are situated between the further tape guides (6, 7) of the cassette. This provides an additional guidance of the magnetic tape (3) at the location of the magnetic-head unit (4), thereby improving the contact between the magnetic tape (3) and the magnetic head (5). (Fig. 2).
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 June 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 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.