Battery comparator educational board

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Description

FIG. 1 is a front perspective view of a battery comparator educational board showing my new design;

FIG. 2 is a left front perspective view thereof shown on a reduced scale; and,

FIG. 3 is a rear perspective view thereof.

Referenced Cited
U.S. Patent Documents
2374800 May 1945 Bohlke
2826628 March 1958 Kruse
3295226 January 1967 Corcoran
Other references
  • Leybold Physics Catalog, 7-1966, p. 117, Control Panels at center of page.
Patent History
Patent number: D243847
Type: Grant
Filed: Oct 15, 1974
Date of Patent: Mar 29, 1977
Inventor: Jack N. Holcomb (Fort Lauderdale, FL)
Primary Examiner: Joel Stearman
Assistant Examiner: C. A. Rademaker
Attorney: Herbert C. Schulze
Application Number: 5/514,896
Classifications
Current U.S. Class: Movable Indicator Or Changeable Exhibitor (D19/64)
International Classification: D1907;