Ake Astberg

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Nacka, SE

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Patents Grantslast 30 patents

Information Patent Grant
Screw rotor machine and rotor profile therefor
- Patent number 4,435,139
- Issue date Mar 6, 1984
- Svenska Rotor Maskiner Aktiebolag
- Ake Astberg
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES