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Aloysius J. Hoogenboom
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Baarsdorp, NL
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Patent Grant
Flow drill for the provision of holes in sheet material
Patent number
4,454,741
Issue date
Jun 19, 1984
Flowdrill B.V.
Aloysius J. Hoogenboom
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...