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
Rock drill of the valveless type
摘要
申请公布号
US1849208(A)
申请公布日期
1932.03.15
申请号
US19280257084
申请日期
1928.02.25
申请人
THE CLEVELAND ROCK DRILL COMPANY
发明人
SLATCHER ALFRED G.
分类号
E21B1/30;E21C37/24
主分类号
E21B1/30
代理机构
代理人
主权项
地址
您可能感兴趣的专利
POSITION DEVIATION INSPECTING METHOD FOR ROUTINE FORMAT DRAWING
PROGRAM FOR TEST FOR SOFTWARE AND METHOD FOR PREPARING TEST DATA
METHOD AND DEVICE FOR DEBUGGING FOR FUZZY INFERENCE
INTERNAL CIRCUIT OPERATION SPEED CONTROL CIRCUIT FOR SEMICONDUCTOR DEVICE
INFERENCE PROCESSING DEVICE DEPENDENT UPON INPUT OPERATION INFORMATION
DC LEVEL CONTROL CIRCUIT
RETRIEVING METHOD
CONTROL SYSTEM FOR MAIN STORAGE DEVICE
METHOD FOR DETERMINING UNCRITICAL DEGREE OF NUCLEAR FUEL TEST BODY
MAGNETIC DETECTING DEVICE
DEVICE FOR COLLATING PRINTING OF NUMBERING MARK
JAPANESE WORD PROCESSOR
OIL WELL DEVICE
MULTILAYER TYPE AUTOMOBILE PARKING AREA
STRUCTURE FOR ASSEMBLY OF FRAME WORK MEMBER
FLUSHING WATER FEEDER
CLEANING WATER SUPPLY DEVICE FOR STOOL
CLEANING WATER SUPPLY DEVICE
CLEANING WATER SUPPLY DEVICE FOR TOILET BOWL
TREATMENT OF AROMATIC POLYAMIDE FIBER WOVEN FABRIC
