Patents by Inventor Donald H. Cronquist, Jr.

Donald H. Cronquist, Jr. 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).

  • Pneumatic gripper for a nailing machine
    Patent number: 4489819
    Abstract: This invention concerns an apparatus for charging pneumatic gripper heads and maintaining the charge while the heads move between spaced locations.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: December 25, 1984
    Inventors: Lloyd E. Perrin, Donald H. Cronquist, Jr.