Multiple flexible disk file
CA 1056056 A · Owner: International Business Machines Corporation · Inventors: Thompson, Paul A.; Talke, Frank E.; Penfold, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A disk file includes a pressurized spindle for mounting a multiplicity of flexible disks, and apertured spacers for uniformly spacing and for stabilizing the flexible disks during rotation. Selected adjacent disks are parted by a wedge or knife-like element, and an accessing magnetic head is moved into transducing relation with a selected disk surface.
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 June 5, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 1996.
- 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.