Patents by Inventor Victor L. Caldwell

Victor L. Caldwell 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).

  • Mail box rotatable signal
    Patent number: 3968928
    Abstract: A signal for a rural mail box which is automatically moved from one signalling position to another when the door of the mail box is opened, thus indicating to an observer located at a distance that the box has been opened and that mail has been deposited therein. The mechanism for operating the signal includes a pull rod attached to the door of the mail box and having a lost motion connection with a spindle carrying the signal.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: July 13, 1976
    Inventor: Victor L. Caldwell