Patents by Inventor Ranjit Dey

Ranjit Dey 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).

  • Storage battery charging and monitoring apparatus
    Patent number: 4571533
    Abstract: A battery charging apparatus automatically charges a storage battery to a predetermined voltage level in a rate proportional to the voltage condition of the battery. The charging apparatus is operative only when the battery is properly connected to its output terminals and a suitable alternating current source is present at its input. The apparatus also has means to signal improper reverse polarities connection to the storage battery. A monitoring device is provided in association with the charging apparatus, which is operative to provide a sequential light signal to indicate the voltage condition of the battery.
    Type: Grant
    Filed: January 21, 1983
    Date of Patent: February 18, 1986
    Inventor: Ranjit Dey
  • Battery charger mounting bracket
    Patent number: D288171
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: February 10, 1987
    Inventor: Ranjit Dey
  • Indoor/outdoor timer enclosure
    Patent number: D295502
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: May 3, 1988
    Inventor: Ranjit Dey