June 1933 Electrical and scientific apparatus Trademarks by day
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Electrical and scientific apparatus Trademarks filed in June 1933
POLAROGRAPH
Filed: June 5, 1933
ELECTRICAL ANALYZING APPARATUS NAMELY, ELECTRICAL APPARATUS ADAPTED TO RECORD THE PRESENCE AND QUANTITY OF CERTAIN SUBSTANCES…
Owned by: POLAROGRAPH LABORATORIES OF AMERICA
Serial Number: 71338537
