Patents by Inventor Derrick J. Maltby

Derrick J. Maltby 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).

  • Patent number: D249914
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: October 17, 1978
    Assignee: Cairnes Maltby Associates Limited
    Inventors: Denis Cairnes, Derrick J. Maltby