U.S. federal trademark · Serial No. 74016422 · Reg. No. 1643415
gemological test kit, namely microscope, magnification attachments, fiberoptic probe, polarizing filters, ultraviolet viewer, refractometer, light source apparatus, prism spectroscope, diamond color grading light, diamond thermal conductivity probe, diamond grading tray, heavy liquid set with calibration stones and adjustment liquid, immersion cell, viewing cabinet, leveridge gauge with high setting attachment, calcite dichroscope, thermal reaction tester, carat/gram weight scale, tweezers and stoneholder, optic figure sphere, clear and frosted stage plates, rechargeable battery pack and voltage switchable power supply, built into a ruggedized shipping case and sold as a unit, and lab table therefor
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.