Cofferdam
United States Patent 2240567

Inventors:
Meacham, Merle R.
Otto, Lessing
Publication Date:
05/06/1941
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Assignee:
STANDARD OIL DEV CO
Primary Class:
405/65
Other Classes:
114/229, 405/72, 405/70
International Classes:
B63B25/08; E02B15/04; B63B25/00