Vyacheslav I. Prokofiev

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Rybinsk Yaroslavskoi oblasti, SU

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Patents Grantslast 30 patents

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Method of producing hollow articles by deep drawing
- Patent number 4,470,287
- Issue date Sep 11, 1984
- Evgeny A. Antonov
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method of producing hollow articles by deep drawing and press for e...
- Patent number 4,357,816
- Issue date Nov 9, 1982
- Evgeny A. Antonov
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...