Machine for teaching the manner in which a clock indicates time

Details Machine for teaching the manner in which a clock indicates time Machine for teaching the manner in which a clock indicates time

1975-11-24

1977-04-05

Feifer, Melvin B.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D1907

Patent

active

D02439506

REFERENCES:
housewares, Jan. 1974, p. 64, upper right, clock.
The Sunday Star, Washington, D. C., Nov. 1, 1964, Gravure Supplement, Woodward & Lothrop Advt., owl clock.

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