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
Improvements in or relating to mining and excavating
摘要
申请公布号
GB631094(A)
申请公布日期
1949.10.27
申请号
GB19440012145
申请日期
1944.06.26
申请人
CECIL PERCY TOOTH ASTON;CHARLES WILDI
发明人
分类号
E21B43/29
主分类号
E21B43/29
代理机构
代理人
主权项
地址
您可能感兴趣的专利
ベルトコンベヤおよび電磁駆動装置
MAGNETIC SENSOR
IMAGE FORMING APPARATUS AND DISCHARGE START VOLTAGE MEASURING METHOD
LIQUID CRYSTAL DISPLAY DEVICE
OPTICAL MODULE
KARAOKE SINGING SCORING SYSTEM
IMAGE FORMING APPARATUS
MANUFACTURING METHOD OF OPTICAL MEMBER AND ULTRAVIOLET CURABLE RESIN COMPOSITION
LIQUID CRYSTAL DISPLAY DEVICE
FLUID DETERMINATION APPARATUS AND FLUID DETERMINATION METHOD
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
DISPLAY MODULE
MAGNETIC SENSOR
WATERPROOF RESIN SHEET AND JOINING METHOD
FITTING STRUCTURE OF OUTER WALL PANEL
METHOD FOR PRODUCING POLYIMIDE FILM
FLAME-RETARDANT RESIN COMPOSITION, FLAME-RETARDANT MASTER BATCH, MOLDED BODY, AND MANUFACTURING METHOD THEREOF
POTATO SCAB CONTROL METHOD
OPTICAL GLASS
PATCHES
