DRAG TYPE DRILLING BIT,申请号GB19880006680-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	DRAG TYPE DRILLING BIT
摘要
申请公布号	GB2202877(B)	申请公布日期	1990.10.31
申请号	GB19880006680	申请日期	1988.03.21
申请人	* SMITH INTERNATIONAL INCORPORATED	发明人	KENNETH WILLIAM * JONES
分类号	E21B10/00;E21B10/54;E21B10/55;E21B10/56;E21B10/567;E21B10/60	主分类号	E21B10/00
代理机构		代理人
主权项
地址

您可能感兴趣的专利

METHOD OF PRODUCING DERIVATIVES OF 2-ARYLPROPYL ESTER OR THIOESTER

INRIKTNINGSANORDNING FOR EN LJUSKELLA SOM UTSENDER ICKE SYNLIGT LASERLJUS

UNDERJORDISKT LAGRINGSSYSTEM FOR GAS OCH VETSKOR

FOERFARANDE FOER FRAMSTAELLNING AV -LAKTAMER.

EJECTOR AERATION TANK

RAW MIX FOR PRODUCING HEAT INSULATION BACKFILL

DEVICE FOR CONTROLLING D.C. TO VARIABLE THREE-PHASE VOLTAGE CONVERTER

DEVICE FOR CONTROLLING THYRISTOR PULSE-WIDTH CONVERTER

FREMGANGSMAADE TIL FREMSTILLING AF EN RUNDLOEKKE

ARRANGEMENT FOR REELING UP DISPENSING HOSE

ION ACCELERATOR

TRANSMITTING TELEVISION CAMERA

AUTOMATIC DIALING DEVICE

TRANSCEIVER OF DIGITAL SIGNALS

TERNARY COMPUTING DEVICE

METHOD OF CONTROLLING TWO-PHASE INDUCTION MOTOR IN OSCILLATORY MODE

COVER OF SPORTS COURT

PERFORATOR TO ROPE-TWISTING MACHINE