Patents for Franklin Alfred Errington


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Patents for Franklin Alfred Errington
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
558,053	Apr. 14, 1896	F.A. Errington	Automatic Tapping Attachment	tapping heads and chucks
558,055	Apr. 14, 1896	F.A. Errington	Tapping Attachment	tapping heads and chucks