Envelope opener

Details Envelope opener Envelope opener

1998-11-17

2000-04-18

Zarfas, Louis S.

Tools and hardware

Other tools and implements

Cutting

D8 61, 0803

Patent

active

D0422874&

REFERENCES:
patent: D202673 (1965-10-01), Kamp
patent: D204338 (1966-04-01), MacKrell
patent: D212062 (1968-08-01), Davis
patent: D260133 (1981-08-01), Power et al.
patent: D263276 (1982-03-01), Tagaki
patent: D272229 (1984-01-01), Oussani
patent: 2656889 (1953-10-01), Kaplan
patent: 3828634 (1974-08-01), Luperti
patent: 3943807 (1976-03-01), Bingham
patent: 4576287 (1986-03-01), Bingham
patent: 4741105 (1988-05-01), Wong
patent: 5156515 (1992-10-01), Charron
patent: 5443253 (1995-08-01), Dale
patent: 5470182 (1995-11-01), Krupotich et al.

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