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
Earth boring bit with protected seal means
摘要
申请公布号
EP0515780(B1)
申请公布日期
1996.11.06
申请号
EP19920104308
申请日期
1992.03.12
申请人
BAKER HUGHES INCORPORATED
发明人
HALL, JAMES R.;MAURSTAD, CARY A.
分类号
E21B10/22;E21B10/25;F16J15/34;(IPC1-7):E21B10/22
主分类号
E21B10/22
代理机构
代理人
主权项
地址
您可能感兴趣的专利
TIRE-WHEEL OR TIRE-RIM CARRIER FOR PICK-UP TRUCKS
GAS SCRUBBERS
REFRIGERATING APPARATUS
APPARATUS FOR CONNECTING PORTABLE TELEPHONES TO LINES IN THE FIELD
APPARATUS FOR STRETCHING WEBS
Vitreous coated refractory metals, method for producing the same, and vitreous enamel composition
Ball bearing mounting for form rollers
Grain drill drive
Bottle handle assembly
Bracelet holder display box
Conveyor mechanism
Elevator control
Manufacture of tufted fabrics
Tube flaring tool
Manicure tools
Instrument for the relief of itch under a plaster cast
Non-fouling flag holder
Washing machine having water jet washing means
Dust collecting and spray device for grinding machines
Method for making relief maps
