Trademark Overview
On Monday, June 11, 1928, a trademark application was filed for A/B SF with the United States Patent and Trademark Office. The USPTO has given the A/B SF trademark a serial number of 71267823. The federal status of this trademark filing is EXPIRED as of Tuesday, November 3, 1992. This trademark is owned by AKTIEBOLAGET SLVENSKA FLAKTFABRIKEN. The A/B SF trademark is filed in the Environmental Control Instrument Products category with the following description:
CENTRIFUGAL FANS AND PROPELLER FANS FOR HEATING AND VENTILATING PURPOSES AND FOR EXHAUSTING SMOKE AND FUMES AND PROVIDING FORCED AND INDUCED DRAFT FOR FURNACES, AIR HEATERS OF THE RADIATOR TYPE UTILIZING STEAM OR HOT WATER FOR HEATING AIR FOR VENTILATING AND INDUSTRIAL PURPOSES, UNIT HEATERS UTILIZING STEAM OR HOT WATER AND COMPRISING BLOWERS AND AIR HEATERS OF THE RADIATOR TYPE FOR HEATING AIR AND VENTILATING PURPOSES, HEAT EXCHANGERS UTILIZING HOT AIR OR HOT EXHAUST GASES FOR HEATING GAS AND AIR, AIR-HUMIDIFYING APPARATUS FOR INCREASING THE HUMIDITY OF THE AIR FOR INDUSTRIAL PURPOSES AS IN WEAVING AND SPINNING MILLS, AND AIR FILTERS OF THE CENTRIFUGAL OR FAN TYPE, THE SCREEN OR SIEVE TYPE, AND OF THE BAFFLE TYPE FOR REMOVING IMPURITIES FROM THE AIR
