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
Well tool
摘要
申请公布号
US2348563(A)
申请公布日期
1944.05.09
申请号
US19400349772
申请日期
1940.08.02
申请人
OTIS HERBERT C
发明人
OTIS HERBERT C.
分类号
E21B25/02;E21B34/08
主分类号
E21B25/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
UN PROCEDIMIENTO PARA PRODUCIR EFECTOS DE LUZ POR TRANSPARENCIA, EN LáMINAS, ESTAMPAS O CUADROS COLOREADOS.
Construction en béton armé
Procédé et appareil perfectionnés de cracking
A new or improved method of and means for making and repairing roads
Improvements in or relating to electric tumbler switches
Improvements in or connected with power saw gins used for ginning cotton
Improvements in pie or like moulding machines
Improvements in and relating to brace ends and the like for personal wear
An improvement in or relating to rolling or lap boards for fabrics and the like
Improvements in and relating to rims for pneumatic tyred wheels
Improvements in or relating to cameras
Improvements relating to the control of theatre and like lighting systems
Improvements in current collectors for electric vehicles
Improvements in and relating to coin-freed delivery machines
An improved device for drawing geometrical curves and designs
Improvements in or connected with the manufacture of sheet metal boxes or cans
Improvements in or relating to electrical plug-and-socket couplings
Improvements in shaking mechanism for devices such as bag filters
Heating elements for brewing vats
Perfectionnements aux joints hydrauliques, en particulier aux joints hydrauliques degazogènes ou générateurs de gaz
