Patents by Inventor Charles A. Nelson, Jr.

Charles A. Nelson, 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).

  • Rotary spool valve
    Patent number: D320257
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: September 24, 1991
    Assignee: A-Dec, Inc.
    Inventors: George K. Austin, Jr., Charles A. Nelson, Jr.