Patents by Inventor Adrian Dean Venderjagt

Adrian Dean Venderjagt 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).

  • Hardness tester
    Patent number: 3934463
    Abstract: Hardness testing apparatus including a workpiece penetrator, a stop for interrupting movement of the penetrator after it has penetrated the workpiece to a predetermined depth, and mechanism for individually measuring the load on the penetrator when it has penetrated the workpiece to the predetermined depth.
    Type: Grant
    Filed: February 28, 1974
    Date of Patent: January 27, 1976
    Inventor: Adrian Dean Venderjagt