Patents by Inventor Merrick Holden

Merrick Holden 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).

  • Method employing D.C. pulses for the detection of disseminated or massive mineralization within the earth crust by producing an A.C. electromagnetic field
    Patent number: 3959721
    Abstract: Pulses of direct current are applied to the ground by means of a pair of electrodes or by means of a coil. These pulses produce an alternating current magnetic field if they are in the vicinity of a zone of mineralization. These secondary currents are measured both during and after the duration of the pulses thus enabling the zone to be deliniated readily and easily. The quality, quantity and geometry of the mineralized zone may be ascertained by analysing the characteristics of the secondary, alternating current magnetic field.
    Type: Grant
    Filed: June 19, 1974
    Date of Patent: May 25, 1976
    Inventors: John Roschuk, Merrick Holden