Patents by Inventor Paul D. Calhoun

Paul D. Calhoun 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).

  • Center fire pistol and rifle cartridge case polishing apparatus
    Publication number: 20120036984
    Abstract: What is new in the art of the invention is that it will accommodate all sizes of, Boxer style, spent center fire brass pistol and rifle casings faster, safer, more economically, more environmentally sound, with less parts (see Mancini/Galloway), and far better than the use of a media tumbler currently used for this purpose.
    Type: Application
    Filed: August 13, 2010
    Publication date: February 16, 2012
    Inventor: Paul D. Calhoun