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
Core barrel
摘要
申请公布号
US2857138(A)
申请公布日期
1958.10.21
申请号
US19540440942
申请日期
1954.07.02
申请人
E. J. LONGYEAR COMPANY
发明人
SVENDSEN WALTER W.;JR. JOHN C. C. BLAIR,
分类号
E21B25/02
主分类号
E21B25/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
IRON AND STEEL ADDITION AGENT
MOULTEN FERROUS METAL PROCESSING AND ADDITION AGENT
Process of making metal for castings
Improvements in apparatus for applying crown corks or like closure members to filledbottles or other receptacles
Improvements in or relating to photo-electric apparatus
BAG MACHINE SEVERING MECHANISM
TUBE CAKE PAN
SLIDING DOOR ASSEMBLY
SOCKET FOR AIRSCREW BLADES, SPARS AND STRUTS
GARBAGE DISPOSAL DEVICE
FLEXIBLE SHAFT COUPLING
WELDING ROD
CHROMIUM IRON AND STEEL
METAL SHEET FEEDER
MODULATED AMPLIFIER DISTORTION REDUCING SYSTEM
ORE FLOTATION PROCESS
MILK BOTTLE
FASTENER SLIDER
WATER HEATING AND DISTILLING APPARATUS
Patient handling device
