U.S. federal trademark · Serial No. 86037178 · Reg. No. 4630853
Precision engineering/optoelectronic laboratory apparatus, namely, polariscopes; density meters, quartz control standards calibration devices, testing instruments for measuring carbon dioxide levels in packaging containing air, Peltier thermostats; photometers; polarimeters; spectroscopic apparatus, namely, for the observation of emission and absorption spectra of gemstones and chemical liquids; spectrometers; spectrophotometers; spectroscopes; refractometers; apparatus for measuring melting points; scales and gemological testing, checking and measuring apparatus for mobile or traveling precious stone laboratories, namely, for testing the purity and quality of gemstones and for the identification of gemstones; stereo microscopes for examining diamonds and colored stones; dichroscopes; precious stone refractometers and spectroscopes; conoscopes; assayer's tongs for stones; magnifying lenses for testing diamonds and telescopic spectacles; optoelectronic diamond/silicon carbide testers; carat scales
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.