E21B10/10 - CPC Classification Index

ClassID:

135209 ⎘

E21B10/10 - CPC Classification

Classification description:

Drill bits; Roller bits with roller axle supported at both ends

Recent Application in this class:

20230167688

2023-06-01

Drill bit with offset counter-rotating cutters

20220220807

2022-07-14

Hybrid bit

20200165877

2020-05-28

Roller reamer

20190298753

2019-10-03

Methods for treating pulmonary hypertension

20180347356

2018-12-06

Apparatus and method for driving a cavity in mining

20180223600

2018-08-09

Raise boring head for rotary boring

20180202231

2018-07-19

Hybrid drill bit with counter-rotation cutters in center

20180002985

2018-01-04

Bi-directional drilling systems and methods

20160237752

2016-08-18

SUBSURFACE DRILLING TOOL

#10

20150368977

2015-12-24

Composite drill bit

#11

20150075868

2015-03-19

Subsurface drilling tool

#12

20120212034

2012-08-23

Cutter assembly for tunnel boring machine with pressure compensation

#13

20110220422

2011-09-15

Earth-boring cutter mount and assembly

#14

20100126778

2010-05-27

Cutter assembly for a raise boring reamer

#15

15046665

2018-10-16

Rotary drill bit