Drill sharpener

Details Drill sharpener Drill sharpener

1989-08-17

1992-02-25

Dunkins, Bruce W.

Machines not elsewhere specified

Material working, abrading, or founding machinery

Patent

active

D03242242

REFERENCES:
patent: D311027 (1990-10-01), Yuen
patent: 3911629 (1975-10-01), Steinmetz
patent: 4485596 (1984-12-01), Bernard et al.
patent: 4703588 (1987-11-01), Hosoi
patent: 4742648 (1988-05-01), Ketteringham
patent: 4916867 (1990-04-01), Lockwood

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