Patents by Inventor Ralph Edward Johnson

Ralph Edward Johnson 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).

  • Bobbin thread pull-off for lockstitch looptaker
    Patent number: 4091753
    Abstract: A bobbin thread pull-off, attachable to a rotating lock-stitch looptaker in a location to pull bobbin thread from a bobbin after the previous stitch has been set. The pull-off and attachment means are given a thread handling finish prior to assembly to a completed looptaker, no other finishing operations being required after assembly thereto.
    Type: Grant
    Filed: January 13, 1977
    Date of Patent: May 30, 1978
    Assignee: The Singer Company
    Inventors: Ralph Edward Johnson, Donald Rodda