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Patents for Robert H. Hazeltine
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
918,049Apr. 13, 1909R.H. HazeltineMachine for Reseating Valvesvalve grinding tools
918,050Apr. 13, 1909R.H. HazeltineValve Grinding Devicevalve grinding tools
RE13,421May 21, 1912R.H. HazeltineMachine for Reseating Valvesvalve grinding tools
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