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United States Patent 1653053

Inventors:
Edward, Lyndon
Publication Date:
12/20/1927
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Assignee:
Edward, Lyndon
Primary Class:
428/64.100
Other Classes:
65/50, 359/848, 65/107
International Classes:
C03B23/025; C03B23/03; G02B5/10; C03B23/02