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Norman Ottmann
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Simsbury, CT, US
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last 30 patents
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Patent Grant
Apparatus for making concrete pipe
Patent number
4,042,315
Issue date
Aug 16, 1977
Atlantic Pipe Corporation
Norman Ottmann
B28 - WORKING CEMENT, CLAY, OR STONE
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Patent Grant
Method and apparatus for making concrete pipe
Patent number
4,041,118
Issue date
Aug 9, 1977
Atlantic Pipe Corporation
Norman Ottmann
B28 - WORKING CEMENT, CLAY, OR STONE