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
Tool for use in cementing well casing
摘要
申请公布号
US2881840(A)
申请公布日期
1959.04.14
申请号
US19560573909
申请日期
1956.03.26
申请人
B AND W, INC.
发明人
WRIGHT KENNETH A.;SOLUM JAMES R.
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
LIQUID CRYSTAL DISPLAY DEVICE AND ITS DRIVING METHOD
LIQUID CRYSTAL DRIVING CIRCUIT
OPTICAL FUNCTION FILM, ITS MANUFACTURING METHOD, POLARIZER PLATE, OPTICAL ELEMENT, AND IMAGE DISPLAY
MOBILE ELECTRONIC EQUIPMENT
POTENTIAL ADJUSTMENT CIRCUIT, DIFFERENTIAL BALANCE ADJUSTMENT CIRCUIT, ELECTRIC FIELD DETECTION OPTICAL SYSTEM, AND TRANSCEIVER
SIGNAL BLOCKING CIRCUIT AND COMMUNICATION SYSTEM
VIDEO TRANSMISSION SYSTEM
HARD DISC RECORDER
OPERATIONAL AMPLIFIER DEVICE
NETWORK SCANNER APPARATUS
RECOGNITION SYSTEM FOR COMMUNICATION ADDRESS, DISPLAY DEVICE, APPARATUS CONDUCTING NETWORK COMMUNICATION BETWEEN APPARATUS AND DISPLAY DEVICE, METHOD FOR RECOGNIZING COMMUNICATION ADDRESS AND PROGRAM
IP TELEPHONE ADVERTISING DEVICE
CAMERA WITH MOVING PICTURE GENERATING FUNCTION
ORIGINAL CARRYING APPARATUS, IMAGE PROCESSING APPARATUS, AND IMAGE PROCESSING SYSTEM
TRANSMITTER-RECEIVER AND ELECTRONIC APPARATUS USING SAME
SEMICONDUCTOR DEVICE HAVING SOI STRUCTURE
CARRIER STOCKER
MAGNETIC SWITCH
HEAT-DISSIPATING BOARD AND SEMICONDUCTOR DEVICE USING THE SAME
GAPPED CORE STRUCTURE FOR MAGNETIC COMPONENT
