Plaque for use as a teaching aid and collectable item

Details Plaque for use as a teaching aid and collectable item Plaque for use as a teaching aid and collectable item

1992-01-07

1994-02-22

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

D11133

Patent

active

D03445429

REFERENCES:
patent: D34120 (1901-02-01), Housh
patent: D95087 (1935-04-01), Siegrist
patent: D168325 (1952-12-01), Abrams
patent: D228132 (1973-08-01), Fichtel
patent: D274589 (1984-07-01), Christensen et al.
patent: D308055 (1990-05-01), Tedham et al.
patent: D320364 (1991-10-01), Hernandez
patent: D321534 (1991-11-01), Edgerton et al.

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