File folder

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1987-11-16

1991-04-09

Burke, Wallace R.

Office supplies; artists and teachers materials

Book, album or cover

D19 27

Patent

active

D03161080

REFERENCES:
patent: D152134 (1948-12-01), Bauman
patent: D212148 (1968-08-01), Dean
patent: D268347 (1983-03-01), Marsh
patent: D302830 (1989-08-01), Popat et al.
patent: 3367340 (1968-02-01), David et al.
patent: 4137650 (1979-02-01), Hayes
patent: 4744689 (1988-05-01), Sternberg
Visual Systems, 1985 (catalog), p. 252, Element A--Standard binder.

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