Drill bit head

Details Drill bit head Drill bit head

2003-03-17

2004-06-29

Davis, Antoine Duval (Department: 2913)

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

Design Patent

active

D0492331

CLAIM:
The ornamental design for a drill bit head, as shown and described.

REFERENCES:
patent: 4813500 (1989-03-01), Jones
patent: 5103922 (1992-04-01), Jones

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