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Patents for Edward Parkinson
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
716,279	Dec. 16, 1902	A. Rieffel	Micrometer Gage	micrometer depth gauges
747,224	Dec. 15, 1903	A. Rieffel	Micrometer Gage	micrometers

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