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Patent number:
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Patents for H. J. Burnham
Patents 1 - 2 of 2
Number
Date
Patentee
Title
Type
296,242
Apr. 01, 1884
W. Steers
Extension-bit
auger bits
950,782
Mar. 01, 1910
A.B. Jennings
Expansible bit
auger bits
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