Safety knife

Details Safety knife Safety knife

1989-12-27

1992-02-18

Ansher, Bernard

Tools and hardware

Other tools and implements

Cutting

Patent

active

D03239675

REFERENCES:
patent: D229391 (1973-11-01), Nelms
patent: D256217 (1980-08-01), Korn
patent: D295365 (1988-04-01), Freedman
patent: D310474 (1990-09-01), Bartsch et al.
patent: 3178812 (1965-04-01), Lurie
patent: 3751806 (1973-08-01), Patrick
patent: 3906627 (1975-09-01), Manning
patent: 4012836 (1977-03-01), Baer et al.
patent: 4631829 (1986-12-01), Schmidt et al.

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