首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
DRILL ROD RETRIEVAL DEVICE
摘要
申请公布号
CA2014217(A1)
申请公布日期
1991.10.09
申请号
CA19902014217
申请日期
1990.04.09
申请人
WALSH, DAVID H.;WALSH, CHARLES B.
发明人
WALSH, DAVID H.;WALSH, CHARLES B.
分类号
E21B23/02;E21B31/20;E21C37/00
主分类号
E21B23/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
TREATING AGENT FOR HEPATOPATHY
GRANULAR SILICON SUPPLYING DEVICE
CRYSTAL GROWING DEVICE
PRODUCTION OF GLASS PRODUCT FORMED BY USING GRAPHITE
PRODUCTION OF SINGLE-DISPERSED CADMIUM SULFIDE PARTICLES
CONTROL DEVICE OF CROSSING GATE AT RAILROAD CROSSING
STRUCTURE FOR COOLING ELECTRIC EQUIPMENT FOR VEHICLE
DEVICE FOR ANTI-SKID CONTROL
TRANSMISSION MOUNT OF VEHICLE
POWER TRAIN STRUCTURE OF VEHICLE
HEAVY DUTY PNEUMATIC RADIAL TIRE
SCREEN PRINTING MACHINE
INJECTION MOLDING METHOD
MOLD
MEASURING METHOD FOR ROTATION AXIS OF ROBOT JOINT
CONTROL METHOD FOR INDUSTRIAL ROBOT
AUXILIARY DEVICE FOR MACHINE TOOL
PILLAR AND BEAM CONNECTING METAL FITTING IN HOUSING UNIT AND MANUFACTURE THEREOF
FATIGUE STRENGTH IMPROVING METHOD FOR STEEL MEMBER
CUTTING OFF METHOD FOR FERRITE PLATE