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
Rotary rock disk bit
摘要
申请公布号
US2003793(A)
申请公布日期
1935.06.04
申请号
US19290397238
申请日期
1929.10.04
申请人
SPERRY JAMES W
发明人
SPERRY JAMES W.
分类号
E21B10/12
主分类号
E21B10/12
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Cell Reselection Method in Dual Mode Mobile Telecommunication
Heat radiator for sauna capable of dry and wet method
METHOD FOR TRANSMITTING COMMON CONTORL INFORMATION IN WIRELESS MOBILE COMMUNICATION SYSTEM
HANDOVER METHOD OF COMMUNICATION TERMINAL AND COMMUNICATION TERMINAL USING THE SAME
Novel Retinyl Ascorbate Compounds and Preparation Method thereof
FREQUENCY CONVERTER AND DRIVING METHOD OF FREQUENCY CONVERTER
Apparatus and method for estimating location and generating map of mobile body, using upper image, computer-readable recording media storing computer program controlling the apparatus
Air Sealing Body and a Check Valve Device thereof Capable of Intensifying Air-tightness
Ceramic coating Iron and steel sinker on a fishline and Manufacturing Method thereof
LIQUID CRYSTAL DISPLAY DEVICE
METHOD FOR MANUFACTURING IMAGE SENSOR
fiber filter Apparatus
Resizing and cutting apparatus for wound manufactured good
NANOELECTRONIC AND MICROELECTRONIC CLEANING COMPOSITIONS
High Resolution and Wide Dynamic Range Integrator
Avstrykare för avlägsnande av borrkax hos skärstålsaggregat och metod
Element belagt med en vattenlöslig färg och utformat för ingjutning i betong samt betonggjutstycke
STAINLESS STEEL PRODUCT, USE OF THE PRODUCT AND METHOD OF ITS MANUFACTURE
Combinations comprising a VEGF receptor inhibitor
MONITERIRNG SYSTEM FOR GAS FILLING AND VALVE CONNECTION
