Patents by Inventor Calvin D. Buell

Calvin D. Buell 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).

  • Nautical chart case
    Patent number: 4365433
    Abstract: A waterproof chart case for retaining a plurality of separate charts in chosen sequence inside a roll-up cover. The separate charts are individually contained in waterproof holders which are in hinged, stacked relationship one relative to the other on the inner side of the cover. A separate closure means is used to retain each of the chart holders in place.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: December 28, 1982
    Inventor: Calvin D. Buell