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3906888
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Information
Patent Grant
3906888
References
Source
Patent Number
3,906,888
Date Filed
Not available
Date Issued
Tuesday, September 23, 1975
48 years ago
CPC
B63B1/36 - using mechanical means
B63H1/38 - characterised solely by flotation properties
Y02T70/121 - Reducing surface friction
US Classifications
440 - Marine propulsion
416 - Fluid reaction surfaces
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