Patents by Inventor Donald M. Fryer

Donald M. Fryer 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).

  • Apparatus for dispensing and transporting fine materials
    Patent number: 4077527
    Abstract: An apparatus for transporting and dispensing fine materials comprising a rotating conduit with a nonrotating coil spring therein.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: March 7, 1978
    Assignee: Autoclave Engineers, Inc.
    Inventors: Donald M. Fryer, Richard K. Reber