Patents by Inventor Harry I. DeHart

Harry I. DeHart 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).

  • Burglar warning device
    Patent number: 3968485
    Abstract: A twine or cord is stretched across an entrance and secured at one end to one side of the entrance and at the other end linked loosely to an electric light switch near the other side of the entrance so that upon opening the entrance by way of a door by burglar or intruder the switch is activated by a pull on the cord, and thence the switch, and thereafter the link slips off the switch to prevent breakage of the cord.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: July 6, 1976
    Inventor: Harry I. DeHart