Trademark Overview
On Tuesday, December 26, 1989, a trademark application was filed for KEY STONE with the United States Patent and Trademark Office. The USPTO has given the KEY STONE trademark a serial number of 74014011. The federal status of this trademark filing is ABANDONED - FAILURE TO RESPOND OR LATE RESPONSE as of Friday, November 2, 1990. This trademark is owned by TP ORTHODONTICS, INC.. The KEY STONE trademark is filed in the Medical Instrument Products category with the following description:
orthodontic brackets made of ceramic material and ligatures, springs or lock pins to be used in conjunction with these brackets