Drill bit sharpener

Details Drill bit sharpener Drill bit sharpener

1992-04-16

1993-12-07

Ansher, Bernard

Tools and hardware

Other tools and implements

Abrading

Patent

active

D03420078

REFERENCES:
patent: D278205 (1985-04-01), Lindgren
patent: D309559 (1990-07-01), Vaccaro
patent: 3698140 (1972-10-01), Steadman
patent: 3961450 (1976-06-01), Knaell
patent: 4016685 (1977-04-01), Moores, Jr. et al.
patent: 4142332 (1979-03-01), Clarke

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