Hard rock percussion drill bit with paraboloid PCD inserts

Details Hard rock percussion drill bit with paraboloid PCD inserts Hard rock percussion drill bit with paraboloid PCD inserts

2007-03-09

2008-08-05

Snapp, Sandra (Department: 2915)

Machines not elsewhere specified

Material working, abrading, or founding machinery

Element or attachment

Design Patent

active

D0574403

CLAIM:
The ornamental design for a hard rock percussion drill bit with paraboloid PCD inserts, as shown and described.

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Brunner & Ray Drilling Accessories, catalog, 1997, pp. 1-13, No. 97 DRC, US.

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