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
摘要
申请公布号
JPS644037(B2)
申请公布日期
1989.01.24
申请号
JP19820024581
申请日期
1982.02.19
申请人
HITACHI CONSTRUCTION MACHINERY
发明人
KUSUMI HIROSHI
分类号
E21B11/00;E21B10/32
主分类号
E21B11/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
FUEL CELL STACK
LAMINATING PROPERTY IMPROVING STRUCTURE OF METAL SEPARATOR FOR FUEL CELL STACK
IMAGE FORMING APPARATUS
IMAGE FORMING APPARATUS
DISPLAY DEVICE
METHOD FOR PRODUCING GRAIN ORIENTED SILICON STEEL SHEET CAPABLE OF STABLY OBTAINING MAGNETIC PROPERTY IN SHEET WIDTH DIRECTION
FREQUENCY CONVERTER
epsi-IRON OXIDE POWDER HAVING GOOD DISPERSIBILITY
COMPARATOR CIRCUIT
METHOD FOR MANUFACTURING METALLIZED CERAMIC SUBSTRATE
HOLOGRAM RECORDING AND REPRODUCING APPARATUS
OPTICAL PICKUP AND OPTICAL DISK DEVICE
OPTICAL PICKUP DEVICE
COMPOUNDING MATERIAL FOR PTC THERMISTOR AND SEMICONDUCTOR CERAMIC COMPOSITION FOR PTC THERMISTER
RECORDING FAULT DETECTING APPARATUS, RECORDING FAULT DETECTING METHOD AND PROGRAM, AND IMAGE RECORDING APPARATUS
EXPANDED MEMORY DEVICE AND MEMORY EXPANSION SYSTEM
RIDING MOVEMENT VEHICLE
PUNCTURE TREATMENT NAVIGATION APPARATUS
MULTI-CHIP PACKAGE EQUIPPED WITH INTER-CHIP HEAT TRANSFER SHIELDING SPACER
ADHESIVE COATING DEVICE, BOOKBINDING DEVICE EQUIPPED THEREWITH AND IMAGE FORMING SYSTEM
