Learning dial for a clock

Details Learning dial for a clock Learning dial for a clock

1999-07-08

2000-04-11

Holtje, Martie K.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D10126, D10122, 1907

Patent

active

D04226356

REFERENCES:
patent: D054950 (1920-04-01), Montgomery
patent: D140234 (1945-02-01), Thomnpson
patent: D173075 (1954-09-01), Miller
patent: D230050 (1974-01-01), Fukumoto
patent: D230063 (1974-01-01), Fukumoto
patent: D397951 (1998-09-01), Gang
patent: D405470 (1999-02-01), Messina
patent: D413813 (1999-09-01), Butler
patent: 3595009 (1971-07-01), Pakter et al.

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