U.S. federal trademark · Serial No. 50019246
Graduation checkers; Calibration devices for calibrating optical emission spectrometers; Calibration devices for calibrating Industrial X-ray apparatus in the nature of testing equipment for determining industrial flaws; Calibration devices for calibrating optical emission spectrometers, atomic absorption spectrometers and X-ray apparatus, other than for medical use; Calibration devices for calibrating X-ray diagnostic apparatus other than for medical use; Industrial calibration sensors
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