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Patent:US2454157

Patent:	US 2454157
Title:	Sewer Design Slide Rule
Date:	16.11.1948
Place:
Country:	USA
Person:	Goldfien, I. (P)
Company:
Internal Links:	Rechenschieber
Keywords:
Link to the patent office: (without guarantee)	US2454157 (espacenet),  US2454157 (uspto)

Aus der Patentschrift US2454157

• DATUM: 16.11.1948
• TITEL: Sewer design slide rule