Portion of a drill bit

Details Portion of a drill bit Portion of a drill bit

2006-08-01

2006-08-01

Davis, Antoine D. (Department: 2915)

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

Design Patent

active

D0525995

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

REFERENCES:
patent: 3322216 (1967-05-01), Kurt
patent: 5743345 (1998-04-01), Hollar et al.
patent: D454143 (2002-03-01), Åsberg
patent: 6494275 (2002-12-01), Åsberg et al.
patent: D504141 (2005-04-01), Charland et al.

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