Patents by Inventor David A. Dorsey

David A. Dorsey 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).

  • Water filter for cigarettes
    Patent number: 5549124
    Abstract: A water filter for cigarettes wherein water in a frangible capsule is released and dampens the tobacco. This dampened tobacco helps filter the tobacco smoke being sucked through the cigarette.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: August 27, 1996
    Inventor: David A. Dorsey