Rock drill bit

Details Rock drill bit Rock drill bit

2001-01-31

2002-05-21

Siegel, Mitchell (Department: 2912)

Machines not elsewhere specified

Agricultural or construction machinery

Drilling, mining, or soil treatment

Design Patent

active

D0457535

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

REFERENCES:
patent: 3047082 (1962-07-01), Brown
patent: D282666 (1986-02-01), Salmi et al.
patent: 4598779 (1986-07-01), Liljekvist et al.
patent: 5150636 (1992-09-01), Hill
patent: D441380 (2001-05-01), Hamilton et al.

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