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Patent:US1633242


Patent:US 1633242
Title:Adding attachment for typewriting machines
Date:21.06.1927
Place:Hartford, CT und New York
Country:USA
Person:Degener, Gustave O. (P)
Company:Royal Typewriter (P) Comp.
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Link to the patent office:
(without guarantee)
 US1633242 (espacenet),  US1633242 (uspto)


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