Portion of a drill bit

Details Portion of a drill bit Portion of a drill bit

2006-12-12

2006-12-12

Davis, Antoine D. (Department: 2915)

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

Design Patent

active

D0533570

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

REFERENCES:
patent: 1185803 (1916-06-01), Jenkins et al.
patent: 1280696 (1918-10-01), Firl et al.
patent: 1601855 (1926-10-01), Davis

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