Patents by Inventor Richard D. Robertson

Richard D. Robertson 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).

  • Ear cleaning mixture for canine
    Patent number: 4169065
    Abstract: A mixture for cleaning ears of pets, especially dogs, containing a mixture of alcohol, acetic acid, peroxide, soap in a water base.
    Type: Grant
    Filed: November 4, 1977
    Date of Patent: September 25, 1979
    Inventor: Richard D. Robertson