United States. Patent and Trademark Office
Organization
Dates
- Existence: 1836-present
Biography
The United States Patent and Trademark Office is an agency in the U.S. Department of Commerce for granting U.S. patents and registering trademarks. Skellings was issued Patent #4, 270, 824 on June 2, 1981 for a COLOR LANGUAGE TEACHING METHOD AND DISPLAY AND PROCESS FOR CREATING THE DISPLAY.