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1866438
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Patent Grant
1866438
References
Source
Patent Number
1,866,438
Date Filed
Not available
Date Issued
Tuesday, July 5, 1932
92 years ago
CPC
E21B17/01 - Risers
B63C11/38 - with entrance above water surface
E21B41/06 - Work chambers for underwater operations
US Classifications
405 - Hydraulic and earth engineering
285 - Pipe joints or couplings
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