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Patent:US3120341


Patent:US 3120341
Title:Adding Machine
Date:04.02.1964
Place:
Country:USA
Person:Plaut
Company:National Research Development Corp
Internal Links:fewer parts, simple mech, no division
Keywords:
Link to the patent office:
(without guarantee)
 US3120341 (espacenet),  US3120341 (uspto)


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