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Full text is not available for this patent. Click on "Images" button above to view full patent.
United States Patent
1,368,532
Issue Date:
February 15, 1921
Current U.S. Class:
33/19.1
Current International Class:
G01K 5/00 (20060101); G01K 5/02 (20060101); B44B 3/00 (20060101)
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