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Patents for Frederic F. Chapman
Patents 1 - 2 of 2
Number	Title	Classification(s)
3,487,865	Cutter-head	144/162.1, 144/229, 144/237, 407/31, 407/43, 407/49
RE27,654	Cutter-head structure	144/162.1, 144/229, 144/237, 407/2, 407/31, 407/43, 407/49

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