Patents by Inventor Douglas A. Richardson

Douglas A. Richardson 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).

  • Calligraphic apparatus and method and engraving tool for use in connection therewith
    Patent number: 4448120
    Abstract: Disclosed herein are an attachment, method, and apparatus for producing calligraphic lettering. The attachment, method, and apparatus involve supporting a calligraphic lettering implement such that the lettering implement does not rotate relative to a workpiece to be lettered as the lettering implement is moved over the workpiece to form a desired letter, character, or symbol thereon. There is also disclosed an engraving tool which has a chisel-pointed, carbide steel tip.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: May 15, 1984
    Inventors: William A. Richardson, Douglas A. Richardson
  • Calligraphic apparatus and method
    Patent number: 4369701
    Abstract: Disclosed herein are an attachment, method, and apparatus for producing calligraphic lettering. The attachment, method, and apparatus involve supporting a calligraphic lettering implement such that the lettering implement does not rotate relative to a workpiece to be lettered as the lettering implement is moved over the workpiece to form a desired letter, character, or symbol thereon. There is also disclosed an engraving tool which has a chisel-pointed, carbide steel tip.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: January 25, 1983
    Inventors: William A. Richardson, Douglas A. Richardson
  • Charm or the like
    Patent number: D249781
    Type: Grant
    Filed: June 8, 1976
    Date of Patent: October 3, 1978
    Inventors: Douglas A. Richardson, William A. Richardson