Battery comparator educational board

Details Battery comparator educational board Battery comparator educational board

1974-10-15

1977-03-29

Stearman, Joel

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D1907

Patent

active

D02438470

REFERENCES:
patent: 2374800 (1945-05-01), Bohlke
patent: 2826628 (1958-03-01), Kruse
patent: 3295226 (1967-01-01), Corcoran
Leybold Physics Catalog, 7-1966, p. 117, Control Panels at center of page.

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