Patents by Inventor Devora Feldman

Devora Feldman 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).

  • Metric unit conversion aid
    Patent number: 4021923
    Abstract: A template incorporating a plurality of openings forming columns and rows having a predetermined alignment and identified by annotations representing metric system units to facilitate use of the device for automatic unit conversion during the performance of mathematical calculations involving dissimilar metric unit quantities.
    Type: Grant
    Filed: January 14, 1976
    Date of Patent: May 10, 1977
    Inventor: Devora Feldman