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Patents for J. S. Birch & Co.
Patents 1 - 2 of 2
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PictureNumberDatePatenteeTitle
88,836Apr. 13, 1869J.S. BirchImprovement in Self-Adjusting Watch-Keys
RE9,310Jul. 20, 1880J.S. BirchImprovement in an Adjustable Holding Device and Watch-Key
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