Combined holder and display device for learning cards

Details Combined holder and display device for learning cards Combined holder and display device for learning cards

1992-09-15

1994-05-10

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D19 60

Patent

active

D03468232

REFERENCES:
patent: D248974 (1978-08-01), Ballereaud
patent: D260305 (1981-08-01), MacGregor et al.
patent: D277420 (1985-01-01), Bakic
patent: D282935 (1986-03-01), Shifflett
patent: D284606 (1986-07-01), Koontz
patent: D309437 (1990-07-01), Ng
patent: D318019 (1991-07-01), van Lelyveld
patent: 3795063 (1974-03-01), Nelson
patent: 4801266 (1989-01-01), Kinberg

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