RESISTOGRAPH

Apparatus for testing materials, namely, apparatus particularly for the verification, recording and analysis of the resistance of a sonde to penetration as well as the resistance of a drilling sonde in particular, used with trees, wood, and wooden materials included in this class

Testing of materials, namely, raw materials particularly for the verification, recording and analysis of the resistance of a sonde to penetration as well as the resistance of a drilling sonde in particular, used with trees, wood, and wooden materials included in this class