Gemological Products Corporation Trademarks
PORTASCOPE
Filed: January 5, 1990
gemologic microscope, optics, and lights built into a ruggedized shipping case and sold as a unit
Owned by: Gemological Products Corporation
Serial Number: 74016392
PORTALAB
Filed: January 5, 1990
gemological test kit, namely microscope, magnification attachments, fiberoptic probe, polarizing filters, ultraviolet viewer…
Owned by: Gemological Products Corporation
Serial Number: 74016422
