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Patent
D307020
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Priority
Apr 08 1987
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Filed
Apr 08 1987
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Issued
Apr 03 1990
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Expiry
Apr 03 2004
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Assg.orig
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Entity
unknown
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9
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7
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n/a
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The ornamental design for a drill bit, as shown and described.
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FIG. 1 is a side elevational view of a drill bit showing our new design;
FIG. 2 is a side elevation view thereof turned 90° with respect to
FIG. 1;
FIG. 3 is an end elevational view thereof; and
FIG. 4 is an elevational view thereof showing the end opposite that in FIG.
3.
Lyng, Bjorn, Tronstad, Hans
Patent |
Priority |
Assignee |
Title |
6497615, |
Mar 22 2002 |
|
Fish scaling tool |
D553169, |
Aug 10 2005 |
SUMITOMO ELECTRIC HARDMETAL CORP. |
End mill |
D555683, |
Aug 10 2005 |
SUMITOMO ELECTRIC HARDMETAL CORP. |
End mill |
D556225, |
Aug 10 2005 |
SUMITOMO ELECTRIC HARDMETAL CORP. |
End mill |
D875147, |
May 10 2018 |
SEED TECHNOLOGIES CORP., LTD. |
Drill bit |
D892868, |
Aug 17 2017 |
Downhole Products Limited |
Tubing shoe |
D923675, |
Mar 11 2020 |
CONPROFE TECHNOLOGY GROUP CO ,LTD |
Head for end mill |
D941373, |
Sep 16 2019 |
KYOCERA SGS PRECISION TOOLS EUROPE LTD |
Rougher tool |
D941374, |
Mar 16 2020 |
KYOCERA SGS PRECISION TOOLS EUROPE LTD |
Finisher tool |
Patent |
Priority |
Assignee |
Title |
3095935, |
|
|
|
4176723, |
Nov 11 1977 |
DTL, Incorporated |
Diamond drill bit |
4350215, |
Sep 18 1978 |
CAMCO INTERNATIONAL INC , A CORP OF DE |
Drill bit and method of manufacture |
4460053, |
Aug 14 1981 |
Eastman Christensen Company |
Drill tool for deep wells |
4553615, |
Feb 20 1982 |
NL INDUSTRIES, INC |
Rotary drilling bits |
4660659, |
Feb 22 1983 |
REED HYCALOG OPERATING LP |
Drag type drill bit |
4669556, |
Jan 31 1984 |
REEDHYCALOG, L P |
Drill bit and cutter therefor |
Date |
Maintenance Fee Events |
n/a
Date |
Maintenance Schedule |
n/a