Improvements relating to earth drilling equipment,申请号GB19620003376-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	Improvements relating to earth drilling equipment
摘要
申请公布号	GB982258(A)	申请公布日期	1965.02.03
申请号	GB19620003376	申请日期	1962.01.30
申请人	ROBERT MORTIMER PENNEY	发明人
分类号	E21B21/02	主分类号	E21B21/02
代理机构		代理人
主权项
地址

您可能感兴趣的专利

MAGNESIUM ALLOY HAVING LOW SPECIFIC GRAVITY AND EXCELLENT WORKABILITY AND ITS PRODUCTION

POWER SUPPLY DEVICE FOR SLIDING DOOR

INJECTION MOLD DEVICE

NONCONSUMABLE ELECTRODE SYSTEM ARC WELDING METHOD

SHUTTER APPARATUS FOR VENTILATION AND HELMET EQUIPPED THEREWITH

PAPER FEEDING ROLLER AND MANUFACTURE THEREOF

WORK CENTERING METHOD AND DEVICE THEREFOR

NETWORK STRUCTURE TO BE IMMERSED IN SEA WATER

SPRING RETURN TYPE STEP OPENING AND CLOSING ACTUATOR

MAGNESITE-CARBON REFRACTORIES

Coiled reinforced retractable sleeve for stent delivery catheter

AXLE MOUNTING MECHANISM

MAKING METHOD OF ALUMINIUM SHEET

CU-MG-SU ALLOY CABLE

BLOWING METHOD OF VACUUM DEGASSING

DEOXIDATION METHOD OF RIMMED CASTING STEEL OF CONTINUOUS CASTING

METHOD OF DETECTING FILTERING SIGNAL TO THE INPUT SIGNAL

IMPACT TESTING APPARATUS IN BATTERY OF DETONATOR