Title:
Smoke-arch seal
United States Patent 1781849

Inventors:
Kiesel Jr., William F.
Publication Date:
11/18/1930
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Assignee:
Kiesel Jr., William F.
Primary Class:
277/606
Other Classes:
285/405, 277/626, 285/343, 285/224, 126/317, 285/180, 105/47
International Classes:
F16J15/08