Patents by Inventor James E. Duffer

James E. Duffer 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).

  • Spill proof spitoon
    Patent number: 10052265
    Abstract: A spittoon constructed from a container including a tamper resistant seal, selectively operable flip top, absorbent medium having a masking odor, an adhesive property when wet, and extended antibacterial, antifungal, and/or germicidal properties.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: August 21, 2018
    Inventors: James E. Duffer, David W. Richardson