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
CORE BARREL CLOSURE FOR SONIC DRILL
摘要
申请公布号
US3525409(A)
申请公布日期
1970.08.25
申请号
USD3525409
申请日期
1968.12.12
申请人
SHELL OIL CO.
发明人
JOHNSTON E. HOLZMAN
分类号
E21B25/06;(IPC1-7):E21B9/20;E21B25/00
主分类号
E21B25/06
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Interventional medical device for use in MRI
NOVEL OPTICAL STORAGE MATERIALS BASED ON NARROWBAND OPTICAL PROPERTIES
AUDIO ENCODING
SECURITY DISPLAY
Integrated or autonomous system and method of satellite-terrestrial frequency reuse using signal attenuation and/or blockage, dynamic assignment of frequencies and/or hysteresis
STRIPING AND CLIPPING CORRECTION
Method and apparatus for selecting a locking policy based on a per-object locking history
CONNECTOR FOR OPTICAL FIBRES
RELAYING DATA IN UNSYNCHRONOUS MODE OF BRAIDED RING NETWORKS
DIRECTIONAL INTEGRITY ENFORCEMENT IN A BI-DIRECTIONAL BRAIDED RING NETWORK
CONTAINER ADAPTED TO HOLD AND DISPENSE BAGGED FLUIDS
贵刁型面条产品
蓬松型无纺布及其制造方法和使用这种无纺布的吸湿性产品
Drive-by-wire steering systems having a steering wheel return mechanism
Block cipher apparatus using auxiliary transformation
INSECTICIDAL SPIROINDANE DERIVATIVES
RECOMBINANT VIBRIO CHOLERAE STRAIN AND VACCINE COMPRISING SAID STRAIN
Opening and closing mechanism for a vehicle door
ROTATION SPEED CONTROL FOR RECORDING INFORMATION
Starch composite reinforced rubber composition and tire with at least one component thereof
