Patents by Inventor Markku R. Bjorkqvist

Markku R. Bjorkqvist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Knock down spool
    Patent number: 4976475
    Abstract: A knock down spool includes a substantially cylindrical central member and radially projecting end flanges connected therewith. The central member comprises at least two sections releasably connected with each other in a substantially axial plane. The central member is at its end portions provided with peripheral grooves releasably engaged by engagement portions of the end flanges for maintaining a position in which the end flanges enclose and keep together the sections of the central member.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: December 11, 1990
    Assignee: AB Varnamo Gummifabrik
    Inventor: Markku R. Bjorkqvist