Title:
Indicator
United States Patent 2113899
Inventors:
John, Oram
Publication Date:
04/12/1938
Export Citation:
Click for automatic bibliography generation
Assignee:
John, Oram
Primary Class:
473/455
Other Classes:
89/36.17, 89/41.06, 250/222.1, 250/224, 273/148R, 273/371, 359/851
International Classes:
A63B69/00; A63B69/00
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