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Patents for Henry B. Allen
Patents 1 - 3 of 3
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
  1,681,797Aug. 21, 1928H.B. AllenAlloy Steel
2,013,943Sep. 10, 1935H.B. AllenCircular Saw
  2,074,296Mar. 16, 1937H.B. AllenApparatus for Making Composite Metals
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