Environmental control apparatus Trademarks Filed in December 12, 1940
DX
Filed: December 12, 1940
Apparatus for Producing a Gas for Use as a Special Atmosphere in Industrial Heating Furnaces
Owned by: SURFACE COMBUSTION, INC.
Serial Number: 71438777
SC
Filed: December 12, 1940
Furnaces Used in the Industrial Arts
Owned by: SURFACE COMBUSTION, INC.
Serial Number: 71438780
