Display device for illustrating scientific codes, and correspond

Details Display device for illustrating scientific codes, and correspond Display device for illustrating scientific codes, and correspond

1987-12-18

1991-01-08

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Patent

active

D03136256

REFERENCES:
patent: D278110 (1985-03-01), Boland, II
patent: 3222072 (1962-06-01), Dreyer
patent: 3487578 (1970-01-01), Sudermann
patent: 3724098 (1973-04-01), McSmith
patent: 4326354 (1982-04-01), Hagberg
patent: 4504236 (1985-03-01), Zellweger
patent: 4600199 (1986-07-01), Krell
patent: 4676762 (1987-06-01), Ballard
patent: 4687207 (1987-08-01), Darling

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