Patents by Inventor Robert L. Sandifer

Robert L. Sandifer 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).

  • Flood detection and alarm system
    Patent number: 7057507
    Abstract: A system for monitoring leaks in dwellings that includes a sensor which detects water flow. The system determines that a leak is occurring when water has flowed through a water line for longer than a preselected period of time. A central monitoring system receives a signal from a local system and the central monitoring system has an associated record for each dwelling to thereby allow flexible response to correct the leak.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: June 6, 2006
    Inventor: Robert L. Sandifer
  • Pendulum toy
    Patent number: 3977085
    Abstract: A pendulum toy using a drawing pen, for making a variety of arcuate designs such as curves, spirals, and cycloids on a work sheet positioned on the surface of the top of a table.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: August 31, 1976
    Inventor: Robert L. Sandifer