Patents by Inventor H. A. Laroo

H. A. Laroo 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).

  • Publication number: 20020145942
    Abstract: A geophone including conductive terminals positioned on opposite sides of the geophone housing. The geophone includes a pair of coils resiliently mounted within the geophone housing and a magnet. A first end plate, a first spring, and a first coil support provide a first end of the electrically conductive path. A second end plate, a second spring, and a second coil support provide a second end of the electrically conductive path. The first and second end of the electrically conductive path are electrically insulated from each and the geophone housing. Providing one or more remaining components with electrically non-conductive surfaces provides electrical insulation.
    Type: Application
    Filed: April 9, 2001
    Publication date: October 10, 2002
    Inventors: A. L. Hagedoorn, H. A. Laroo