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Up to now, there are following ten utility model patents.


No.

Patent

Type

Patent Number

Application Date

Athorization Date

Production Mode

1

Diamond Bit with Concave and Convex Lip Surface

utility model

201120277318.6

1st Aug 2011

7th Mar 2012

Self-developed

2

Diamond Bit with Composite Matrix

utility model

201120277250.1

1st Aug 2011

14th Mar 2012

Self-developed

3

Diamond Bit with Graphite Particulates

utility model

201120277296.3

1st Aug 2011

7th Mar 2012

Self-developed

4

Diamond Bit with Graphite Cylinder

utility model

201120276296.1

1st Aug 2011

14th Mar 2012

Self-developed

5

Diamond Bit with Trapezoid Matrix

utility model

201120277205.6

1st Aug 2011

29th Feb 2012

Self-developed

6

Diamond Bit

utility model

201420118082.5

17th Mar 2014

3rd Sep 2014

Self-developed

7

Diamond Bit

utility model

201420118479.4

17th Mar 2014

20th Aug 2014

Self-developed

8

Diamond Bit with Sheet Iron

utility model

201420118504.9

17th Mar 2014

20th Aug 2014

Self-developed

9

Wire Core-drilling Tools of Coupling Positioning

utility model

201420118617.9

17th Mar 2014

20th Aug 2014

Self-developed

10

Wire Core-drilling Tools of Inner Tube Assembly

utility model

201420118454.4

17th Mar 2014

20th Aug 2014

Self-developed

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