Patents by Inventor John Piwaron

John Piwaron 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).

  • Hair trimmer having a low-friction rotary drive
    Patent number: 5325590
    Abstract: A hair trimmer comprising a body, a cutting assembly supported by the body and having a reciprocable cutter, a drive mechanism for reciprocating the cutter, the drive mechanism including a rotating cam, a drive lever engaged with the cam and with the cutter, and a hinge element for flexibly supporting the drive lever in engagement with the cutter and with the cam, the hinge element including a base fixed to the body, a bar fixed to the drive lever and a hinge arm extending between the base and the bar, the hinge arm including a first web and a second web closely spaced to and parallel with the first web.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: July 5, 1994
    Assignee: Andis Company
    Inventors: Matthew L. Andis, John Piwaron
  • Lather machine
    Patent number: D749263
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: February 9, 2016
    Assignee: ANDIS COMPANY
    Inventors: Mark A. Pleshek, John Piwaron, Timothy Brian Strandell