Patents   USA  

Patent:US1904474

Patent:	US 1904474
Title:	Slide Rule
Date:	18.04.1933
Place:
Country:	USA
Person:	Keuffel, Adolf W. (P)
Company:	Keuffel and Esser (P)
Internal Links:	Rechenschieber
Keywords:
Link to the patent office: (without guarantee)	US1904474 (espacenet),  US1904474 (uspto)

Aus der Patentschrift US1904474

• DATUM: 18.04.1933
• TITEL: Slide rule
• PERSON: KEUFFEL ESSER CO