Trademark Overview
On Friday, October 21, 1949, a trademark application was filed for DOUBLEX with the United States Patent and Trademark Office. The USPTO has given the DOUBLEX trademark a serial number of 71586646. The federal status of this trademark filing is EXPIRED as of Tuesday, November 3, 1992. This trademark is owned by NATIONAL STEEL CONSTRUCTION CO.. The DOUBLEX trademark is filed in the Environmental Control Instrument Products category with the following description:
AUTOMATIC ELECTRIC WATER HEATERS