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
Casing perforator
摘要
申请公布号
US2604941(A)
申请公布日期
1952.07.29
申请号
US19480018996
申请日期
1948.04.05
申请人
AARON ENGLISH;RIDGEWAY LEROY E
发明人
ENGLISH AARON;RIDGEWAY LEROY E.
分类号
E21B43/116
主分类号
E21B43/116
代理机构
代理人
主权项
地址
您可能感兴趣的专利
MONOAXIALLY STRETCHED CRYSTALLINE HIGH-MOLECULAR FILM OR SHEET WITH SUPER COEFFICIENT OF ELASTICITY AND MANUFACTURE THEREOF
WINDING DEVICE OF PHOTOSENSITIVE BODY
MAGNET DEVICE IN MASS SPECTROMETER AND SIMILAR APPARATUS
METHOD AND APPARATUS FOR CONNECTING OPTICAL SIGNAL FROM FIRST TO SECOND LIGHTGUIDE
EXPOSER
RESIN TABLET
APPARATUS FOR MEASURING ABSORPTION ENERGY DISTRIBUTION
FORM PEELING DEVICE OF COPYING MACHINE
ELECTROSTATIC CHARGE
MANUFACTURE OF DISTRIBUTED-LOAD DETECTOR
OPERATION TEACHING METHOD OF ROBOT
AUTOMATIC PAPER-SUPPLYING DEVICE FOR PRINTER
SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
SEMICONDUCTOR DEVICE
COPYING MACHINE
WASHING APPARATUS OF ULTRASONIC MICROSCOPE
MAGNETIC AXIAL TENSION GAGE WITH MEMORY DEVICE
PROCESSING CIRCUIT OF INFORMATION SIGNAL
TELEVISION RECEIVER
HORIZONTAL SYNCHRONIZING EXTRACTION CIRCUIT
