Lockable closure for tanks
United States Patent 1701816

Inventors:
Malluk, Assad M.
Bell, Sidney R.
Publication Date:
02/12/1929
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Assignee:
Malluk
Primary Class:
220/210
Other Classes:
70/165, 220/288, 292/171, 220/259.400, 217/106
International Classes:
F16J13/02; F16J13/00