Rock drill bit

Details Rock drill bit Rock drill bit

2000-06-16

2001-05-01

Davis, Antoine Duval (Department: 2913)

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

Design Patent

active

D0441380

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

REFERENCES:
patent: 5197555 (1993-03-01), Estes

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