Envelope opener

Details Envelope opener Envelope opener

1991-06-21

1993-11-16

Ansher, Bernard

Tools and hardware

Other tools and implements

Cutting

Patent

active

D03413071

REFERENCES:
patent: D161797 (1951-01-01), Smith
patent: D306394 (1990-03-01), Koenig
patent: D329183 (1992-09-01), Lage
patent: D329184 (1992-09-01), Lage
patent: D329584 (1992-09-01), Shevin
patent: 3028670 (1961-04-01), Tilly

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