Patents by Inventor Graham R. Gramwell

Graham R. Gramwell 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).

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    Patent number: D278610
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: April 30, 1985
    Assignee: Steward Smith Investments Limited
    Inventor: Graham R. Gramwell