Patents for J. George Leyner Engineering Co.


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Patents for J. George Leyner Engineering Co.
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
1,258,998	Mar. 12, 1918	J. Ditson	Drill Sharpener	drill grinders
1,258,999	Mar. 12, 1918	J. Ditson	Drill Sharpener