Envelope opener

Details Envelope opener Envelope opener

1988-08-16

1990-12-18

Ansher, Bernard

Tools and hardware

Other tools and implements

Cutting

Patent

active

D03129551

REFERENCES:
patent: D206428 (1966-12-01), Feldmahr
patent: D240190 (1976-06-01), Cleveland
patent: 318475 (1885-05-01), Holden
patent: 436189 (1890-09-01), Prosinger
patent: 802909 (1905-10-01), Brisacher
patent: 1032865 (1912-07-01), Sinnott
patent: 1214894 (1917-02-01), Camillieri
patent: 1649699 (1927-11-01), Irvine
patent: 2247840 (1941-07-01), Harrison
patent: 2442694 (1948-06-01), Keiser
patent: 2649656 (1953-08-01), Hedrick
patent: 3383768 (1968-05-01), Hamilton
patent: 4081907 (1978-04-01), Bosshold

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