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Leif H. A. Larsen
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Svenstrup Jylland, DK
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last 30 patents
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Patent Grant
Acid resistant concrete articles, especially sulfur concrete pipes,...
Patent number
4,981,740
Issue date
Jan 1, 1991
KKKK A/S
Leif H. A. Larsen
B28 - WORKING CEMENT, CLAY, OR STONE