Patents by Inventor Johannes A. E. Oprins

Johannes A. E. Oprins 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).

  • Voltage tester housing with prod retaining channels
    Patent number: 4238728
    Abstract: An electrical testing device having a housing and a testing circuit in the housing. Electric leads extend from the housing, ending with exposed contacts mounted in prod handles. Channels are formed in the sides of the housing affording a mounting location for storage of the prod handles. Each channel can also be used as a prod holder when the device is being used. Circuitry is provided for testing continuity of the leads and for indicating the presence of a potentially harmful or dangerous voltage.
    Type: Grant
    Filed: February 13, 1978
    Date of Patent: December 9, 1980
    Assignee: Ideal Industries, Inc.
    Inventors: Peter M. Wells, Jr., Johannes A. E. Oprins