September 1930 Environmental control apparatus Trademarks by day
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Environmental control apparatus Trademarks filed in September 1930
QUICKUBE

QUICKUBE

Filed: September 29, 1930
ICE TRAYS USED AS REFRIGERATING UNITS
Owned by: FRIGIDAIRE CORPORATION
Serial Number: 71306177

DRAFT-O-STAT

DRAFT-O-STAT

Filed: September 19, 1930
AUTOMATIC DRAFT CONTROLS
Owned by: DORNBACK FURNACE & FOUNDRY CO.
Serial Number: 71305861