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Patents for H. S. Johnson
Patents 1 - 7 of 7
Number	Title	Classification(s)
81,497	Improvement in Box Openers	254/131, 294/17
517,073	Micrometer Calipers	33/831
552,351	Dovetail-mortising machine	144/87
877,352	Cylinder Wrench	81/63.2
877,465	Cylinder Wrench	81/63.2
878,657	Ratchet Wrench	81/59.1, 81/63.1
1,261,432	Milling Machine	142/50, 144/278.1, 269/228, 269/34, 279/109, 409/226, 451/365

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