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Patents for Daniel Powers
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
124,089Feb. 27, 1872H.S. ShepardsonImprovement in bitsdrill bits
191,815Jun. 12, 1877D. PowersBit-stock with gear-train multipliergeared braces
212,110Feb. 11, 1879D. Powers, O. PeckImprovement in bit-stocksbrace chucks
219,872Sep. 23, 1879O. PeckImprovement in bit-stocksbrace chucks
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