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United States Patent 2113899

Inventors:
John, Oram
Publication Date:
04/12/1938
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Assignee:
John, Oram
Primary Class:
473/455
Other Classes:
250/222.100, 273/148R, 250/224, 359/851, 89/41.060, 89/36.170, 273/371
International Classes:
A63B69/00