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
Improvements in or relating to earth well drilling systems
摘要
申请公布号
GB851427(A)
申请公布日期
1960.10.19
申请号
GB19580016989
申请日期
1958.05.28
申请人
DRESSER INDUSTRIES, INC.
发明人
分类号
E21B4/02
主分类号
E21B4/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Melatonin derivaties for use in the therapy of sleep disorders and in pre-anaesthetic medication
TAMPER RESISTING SECURITY SEAL
Tire treads
VALVE WITH PRESETTING FACILITY.
IMPROVED BRASSIERE.
Shoe of natural materials and method for making the same.
Resin formulation
Flea control method
ANTISTATIC POLYOLEFIN FOAMS AND FILMS AND METHOD OF MAKING THE FOAM AND ANTISTATIC COMPOSITION
Device for displaying advertisement on conveyors
SENSOR DEVICES.
DNA SEQUENCES WHICH CODE FOR VIRULENCE CHARACTERISTICS OF --(STREPTOCOCCUS SUIS) AND PARTS THEREOF, POLYPEPTIDES AND ANTIBODIES DERIVED THEREFROM AND THE USE THEREOF FOR THE DIAGNOSIS OF AND PROTECTION AGAINST INFECTION BY --(S. SUIS) IN MAMMALS, INCLUDING MAN
VARIABLE INDUCTANCE CURRENT LIMITING REACTOR CONTROL SYSTEM FOR ELECTROSTATIC PRECIPITATOR.
Preparation and use of synthetic human antibody gene bank (synthetic human antibody libraries)
SHEET METAL WORKING MACHINE
CUTTING TOOL, COMPLETE, WITH REPLACEABLE ADAPTOR
CLEANING ARRANGEMENT INCLUDING FILTERS AND ULTRAVIOLET RADIATION
DRIVING DEVICE FOR VACUUM POWER BREAKER, IN PARTICULAR IN A THREE-POLE CONFIGURATION
WATER FILTER
Substantially rigid thermally insulating panel and method for its manufacture