Combined paper sheets and aperture fasteners therefor

Details Combined paper sheets and aperture fasteners therefor Combined paper sheets and aperture fasteners therefor

1987-11-13

1990-10-16

Burke, Wallace R.

Office supplies; artists and teachers materials

Book, album or cover

D19 32

Patent

active

D03114180

REFERENCES:
patent: 2232975 (1941-02-01), Schade
patent: 2807265 (1957-09-01), Oliva et al.

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