DAVIS # 212.838

# 212.838...............................................................1882
# 212.838...............................................................1882

 

What happened to U.S. Patent dated April 15, 1867 ?

 

pdfpiw.uspto.gov

US Patent 63777   April 9, 1867

 

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Unable to locate US Patent 63778

 

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US Patent 63779   April 16, 1867