Patents by Inventor Harold Duane DeMent

Harold Duane DeMent 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).

  • Magnetic field strength threshold alarm
    Patent number: 8378836
    Abstract: A magnetic field strength threshold alarm that includes sensing means responsive to a magnetic field and actuating in response to field strength above a predetermined threshold, the sensing means being configured to be operational and able to actuate without consumption of energy; and alarm means for outputting an alarm responsive to the sensing means actuation, the alarm means being configured not to consume energy prior to actuation of the sensing means and only consuming energy subsequent to actuation of the sensing means. So, energy is not consumed by the alarm means prior to actuation. The alarm may be considered to include energy storage means for providing electrical energy, wherein the sensing means, the alarm means and energy storage means being operatively connected such that the electrical energy from the energy storage means is provided only when the sensing means is actuated.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: February 19, 2013
    Assignee: Kopp Development Inc.
    Inventors: Keith Kopp, Harold Duane DeMent
  • MAGNETIC FIELD STRENGTH THRESHOLD ALARM
    Publication number: 20110121986
    Abstract: A magnetic field strength threshold alarm that includes sensing means responsive to a magnetic field and actuating in response to field strength above a predetermined threshold, the sensing means being configured to be operational and able to actuate without consumption of energy; and alarm means for outputting an alarm responsive to the sensing means actuation, the alarm means being configured not to consume energy prior to actuation of the sensing means and only consuming energy subsequent to actuation of the sensing means. So, energy is not consumed by the alarm means prior to actuation. The alarm may be considered to include energy storage means for providing electrical energy, wherein the sensing means, the alarm means and energy storage means being operatively connected such that the electrical energy from the energy storage means is provided only when the sensing means is actuated.
    Type: Application
    Filed: November 23, 2009
    Publication date: May 26, 2011
    Applicant: Kopp Development Inc.
    Inventors: Keith Kopp, Harold Duane DeMent