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Patent:US3138874


Patent:US 3138874
Title:Geometric Design Stencil
Date:30.06.1964
Place:
Country:USA
Person:E. S. Cooper
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US3138874 (espacenet),  US3138874 (uspto)


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Aus der Patentschrift US3138874