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3911964
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Patent Grant
3911964
References
Source
Patent Number
3,911,964
Date Filed
Not available
Date Issued
Tuesday, October 14, 1975
49 years ago
CPC
B28B21/60 - prestressed reinforcements
F16L9/08 - of concrete, cement, or asbestos cement, with or without reinforcement
F16L25/0027 - Joints for pipes made of reinforced concrete
Y10S138/05 - Pre-stress
US Classifications
138 - Pipes and tubular conduits
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