Patents by Inventor Harold E. Mann

Harold E. Mann 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).

  • Rain-activated sprinkler shut-off system
    Patent number: 5087886
    Abstract: A moisture detecting system employs a body of porous concrete with electrodes embedded therein. The body of concrete is contained within a housing having an opening in the top thereof to admit rain. The body may also have electrical probes therein connected to the electrodes, which probes can be embedded in the ground to detect moisture therein.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: February 11, 1992
    Inventor: Harold E. Mann