USA

Patent:US2053737

Patent:	US 2053737
Title:	Calculating Apparatus
Date:	08.09.1936
Place:
Country:	USA
Person:	Petschenig, Karl (P)
Company:	Optische Anstalt C. P. Goerz (P) AG
Internal Links:
Keywords:
Link to the patent office: (without guarantee)	US2053737 (espacenet), US2053737 (uspto)

Aus der Patentschrift US2053737

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