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
Drilling apparatus
摘要
申请公布号
US2144627(A)
申请公布日期
1939.01.24
申请号
US19310575273
申请日期
1931.11.16
申请人
SULLIVAN MACHINERY COMPANY
发明人
HOLMES MORRIS P.
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
PROCESS FOR PRODUCING CITRIC ACID AND ISOCITRIC ACID
SHIP CONSTRUCTION
IMPROVEMENTS IN THE FIBRILLATION OF TAPE YARNS
VARIATOR
IMPROVEMENTS IN OR RELATING TO METHODS AND APPARATUS FOR LOADING VEHICLES
IMPROVEMENTS IN OR RELATING TO GAS-CUSHION VEHICLES
CONTROLLED AERATION SYSTEM FOR A COVERED HOPPER RAILWAY CAR IN TRANSIT
BRAKE OR CLUTCH RETRACTOR ASSEMBLY
IMPROVEMENTS IN OR RELATING TO POWER PRESSES
TRIFURCATED FILAMENTS
IMPROVEMENTS IN OR RELATING TO CROP CONVEYING APPARATUS
IMPROVEMENTS IN OR RELATING TO TELEVISION CAMERA APPARATUS
VOICE FREQUENCY SIGNALLING ARRANGEMENT
IMPROVEMENTS IN OR RELATING TO CALENDERING
DYESTUFFS OF THE STYRYL SERIES CONTAINING CARBOXYL GROUPS AND THEIR USE
FLUID FLOW DAMPER ARRANGEMENT
IMPROVEMENTS IN OR RELATING TO THE PROCESSING OF SLIVERS IN TEXTILE MACHINES
ORNAMENTAL MINIATURE BARREL OR CASK
FORCED-FLOW VAPORIZER FOR COMPRESSION-CONDENSATION TYPE REFRIGERATING EQUIPMENT
INHERENTLY BALANCED RECIPROCATING POWER PLANT
