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
Switch and signal control system for railroads
摘要
申请公布号
US2272565(A)
申请公布日期
1942.02.10
申请号
US19390291716
申请日期
1939.08.24
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
LANGDON ANDREW;LIVINGSTON WALTRUS L.
分类号
B61L19/06
主分类号
B61L19/06
代理机构
代理人
主权项
地址
您可能感兴趣的专利
METHOD FOR FORMING IMAGE AND IMAGE FORMED MATTER
INK JET RECORDING MATERIAL AND ITS MANUFACTURING METHOD
HYDROGEN PERMEABLE BODY AND METHOD FOR MANUFACTURING THE SAME
METHOD FOR MANUFACTURING COMPOSITE OXIDE CATALYST FOR OXIDIZING PROPYLENE
PACKAGE AND LID LABEL
SAFETY SYRINGE ASSEMBLY, RETRACTION CONTROL UNIT, NEEDLE RETRACTION MECHANISM, SAFETY SYRINGE, MEDICINE ADMINISTRATION METHOD, CATHETER LOCATING METHOD, MEDICINE DISTRIBUTING METHOD AND RETRACTION CONTROL MODULE
BALLOON CATHETER WHICH CAN CONTROL RELEASE OF PHARMACOLOGICALLY ACTIVE SUBSTANCE BY TEMPERATURE
TIRE AIR PRESSURE MONITORING DEVICE
REFORMING MEMBER FOR POTABLE WATER
SWEETENING AND METHOD FOR PRODUCING THE SAME
LASER THERAPEUTIC INSTRUMENT
EXHAUST GAS DESULFURIZATION EQUIPMENT AND METHOD FOR STARTING THE SAME
METHOD FOR APPLYING COATING LIQUID CONTAINING HIGH INDEX REFRACTION FILLER
COATING/DRYING METHOD FOR POLYMER SOLUTION FILM
CYLINDRICAL BLANKET AND BLANKET CYLINDER AS WELL AS PRINTING UNIT
BEARING ATTACHING AND DETACHING APPARATUS AND SYSTEM THEREOF
DIFFUSE REFLECTION SHEET, TRANSFER MATRIX USED FOR MANUFACTURING THE SHEET, TRANSFER BASE FILM, TRANSFER FILM AND METHOD FOR MANUFACTURING THE SHEET
GAME MACHINE, PERFORMANCE EXPRESSING METHOD FOR THE SAME, AND SERVER
GAME MACHINE
DEVICE AND METHOD FOR BIOFEEDBACK
