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The U.S. Trademark Trial and Appeal Board (TTAB), in late October 2019, dismissed the petition of IML Instrument Mechanic Labor, Inc. for cancellation of the RESISTOGRAPH® trademark in the USA “with prejudice”. This means that the RESISTOGRAPH® trademark continues to be an exclusive trademark belonging to Frank Rinn, the inventor of the term (“RESISTOGRAPH”) for his inventive high resolution resistance drilling devices. Frank Rinn has been developing these high quality machines in Germany since 1986 and his RESISTOGRAPH® trademark is registered in approximately 40 countries. Only machines made by Rinntech are the original Resistograph® devices and entitled to use the Resistograph® trademark. Only data collected with a machine made by Rinntech provide Resistograph® data.