Patents by Inventor John A. Boyllin

John A. Boyllin 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).

  • Coilable tape measures
    Patent number: 4215829
    Abstract: A coilable tape measure comprising a casing, a coilable tape and a recoil spring having its outer end connected to the inner end of the tape, the spring being mounted on a fixed inner spool and the tape being mounted on a rotatable outer spool and the inner spool being prevented from rotating by pegs in the casing engaging holes in the inner spool.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: August 5, 1980
    Assignee: Rabone Chesterman Limited
    Inventor: John A. Boyllin