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Patent:US873314


Patent:US 873314
Title:Computing attachment for type writing machines
Date:10.12.1907
Place:Syracuse und New York
Country:USA
Person:Oscar C. Kavle
Company:John T. Underwood (P)
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Keywords:
Link to the patent office:
(without guarantee)
 US873314 (espacenet),  US873314 (uspto)


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