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
Anlaufvorrichtung fuer die Steigrohrleitung von Erdoelbohrloechern
摘要
申请公布号
DE637995(C)
申请公布日期
1936.11.07
申请号
DE1935W096891D
申请日期
1935.07.18
申请人
WINTERSHALL AKT.-GES.
发明人
分类号
E21B17/00;E21B43/12
主分类号
E21B17/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
MUD TANK OF DRILLSHIP
VALVE ASSEMBLY OF VARIABLE SWASH PLATE COMPRESSOR
METHOD FOR PAYMENT USING BEACON, SYSTEM AND APPARATUS THEREOF
METHOD OF MANUFACTURING A THIN FILM
CONVEYOR SYSTEM FOR METAL DETECTOR
APPARATUS AND METHOD FOR SUPPLYING ELECTRIC POWER USING FLOATING OFFSHORE PLANTS
ENGLISH-STUDY MATERIALS USING KOREAN ALPHABET AND SYSTEM THEREOF
CERVICAL MALADJUSTMENT CORRECTING DEVICE
THE CHANGE DYEING METHOD OF BLACK HAIR COLOR
SERVER, MESSAGING SYSTEM AND INFORMATION PROVIDING METHOD THEREOF
TENT FOR CAMPING
INTERNET BROWSING DEVICE WITH AUTOMATIC CHANGING FUCTION OF OVERSEAS IP AND OPERATING METHOD OF IT
MESSAGING SYSTEM, TERMINAL APPARATUS, SERVER AND MESSAGING SERVICE PROVIDING METHOD THEREOF
METHOD AND APPARATUS FOR MULTICASTING/BROADCASTING IN RELAY NETWORK OF WIRELESS LAN SYSTEM
USER TERMINAL DEVICE, AUDIO SYSTEM AND METHOD FOR CONTROLLING SPEAKER THEREOF
TOUCH WINDOW AND DISPLAY WITH THE SAME
APPARATUS AND METHOD FOR ANTENNA ARRAY SELF-CALIBRATION
CAMERA MODULE HAVING EMPROVED COIL STRUCTURE
PUBLICATION SYSTEM AND METHOD OF MULTI APPSTORE
SUTURE THREAD MANUFACTURING GRIPPER ASSEMBLY
