Leo Hartman

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Beverwijk, NL

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Patents Grantslast 30 patents

Information Patent Grant
Method for the manufacture of metal packaging cans, and a semi-prod...
- Patent number 4,681,237
- Issue date Jul 21, 1987
- Hoogovens Groep B.V.
- Leo Hartman
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Deformation properties of the edge of a deep-drawn metal can
- Patent number 4,261,274
- Issue date Apr 14, 1981
- Hoogovens IJmuiden BV
- Mihaly J. Spanraft
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR