Rotary draw-works for well drilling plant,申请号GB19290009343-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	Rotary draw-works for well drilling plant
摘要
申请公布号	GB330669(A)	申请公布日期	1930.06.19
申请号	GB19290009343	申请日期	1929.03.22
申请人	ARTHUR EMANUEL MARTOIS	发明人
分类号	E21B3/06	主分类号	E21B3/06
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Device for supplying fuel to diaphragm-type carburetor

Antigens embedded in thermoplastic

APPARATUS FOR MEASURING GRAVURE PLATE ENGRAVING CELL AND METHOD FOR ENGRAVING GRAVURE PLATE

DECORATIVE PLATE

LAMINATING STEREOSCOPIC MOLDING APPARATUS AND METHOD

MANUFACTURE OF SURFACE-REINFORCED FOAM

DIE FOR MOLDING RESIN

PNEUMATICALLY LIFTING MOLD REPLACEMENT CONVEYING DEVICE

DECORATIVE LAMINATE PLATE

TOOL GRIPPING MECHANISM FOR TOOL CHANGING ARM

CIRCLE CUTTING ASSIST IMPLEMENT

TRANSFER MACHINE

WELD JOINT EXCELLENT IN WELDING HOT CRACK RESISTANCE

ONE SIDE WELDING METHOD

RETAINER DEVICE OF PUNCH FOR PRESS

METHOD FOR FORMING STEPPED GROOVE IN ROUND BAR

MANUFACTURING EQUIPMENT FOR HIGH STRENGTH STEEL PLATE

METHOD AND DEVICE FOR RECOVERING PHOSPHORUS FROM SLUDGE

OZONE EXTRACTING METHOD BY OZONE ABSORPTION PIPE (OZONE GENERATING AND FEEDING PIPE OR PLATE) AND PRODUCTION OF OZONE WATER BY THIS METHOD