Hinged visor-type door for tape cassette
CA 1235809 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Wulfing, James J.; Rood, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-, Hinged Visor-Type Door For Tape Cassette Abstract, A videotape cassette has a visor-type door (16) at each end of which is an ear (34) or corner part at which a pin (19) hinges the door (16) to a housing (14). As in the prior art the door (16) is biased to either, a fully opened or fully closed position. In the novel cassette, the biasing results from a free-standing finger (32) formed in a wall of the housing (14) which finger, (32) acts as a spring against a squarish platform (38) on the inner face of an ear (34) of the door (16).
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 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2005.
- 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.