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Patent
   D273680
Priority
Nov 18 1980
Filed
Apr 27 1981
Issued
May 01 1984
Expiry
May 01 1998
Inventors
Kangas, Ka…
Assg.orig
Fagersta AB
Assg.curr
Fagersta AB
Entity
unknown
Referenced by
1
References
5
Maint.:
n/a
The ornamental design for a roller bit, as shown and described.

FIG. 1 is a top plan view of a roller bit showing my new design.

FIG. 2 is a side elevational view taken in the direction of any one of the three arrows 2 in FIG. 1;

FIG. 3 is a side elevational view taken in the direction of any one of the three arrows 3 in FIG. 1.

FIG. 4 is a bottom plan view thereof.
INVENTORS:

Kangas, Karl-Erik

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D534070, Sep 14 2005 CROWN PACKAGING TECHNOLOGY, INC Container
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2687875,
3442342,
4187922, May 12 1978 Dresser Industries, Inc. Varied pitch rotary rock bit
4343371, Apr 28 1980 Smith International, Inc. Hybrid rock bit
D265205, Apr 24 1980 Drill bit
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Mar 13 1981KANGAS KARL-ERIKFagersta ABASSIGNMENT OF ASSIGNORS INTEREST 0038800455 pdf
Apr 27 1981Fagersta AB(assignment on the face of the patent)
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