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
Railway track circuit apparatus
摘要
申请公布号
US2220494(A)
申请公布日期
1940.11.05
申请号
US19390296599
申请日期
1939.09.26
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
PLACE WILLARD P.
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
主权项
地址
您可能感兴趣的专利
DYNAMIC PRESSURE FLUID BEARING ROTATING DEVICE
SEMICONDUCTOR INTEGRATED CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
BALL LIFTER
CAPACITOR CHARGING AND DISCHARGING IGNITION DEVICE
SIDE MEMBER STRUCTURE OF VEHICLE
ARTIFICIAL COMPOST
INTEGRATED CIRCUIT DEVICE FOR SIGNAL PROCESSING
THROUGH HOLE FORMATION METHOD
LEAD FORMING METHOD FOR SEMICONDUCTOR DEVICE
PARALLEL ARITHMETIC PROCESSORS
STRUCTURE OF ISLAND TO INSTALL GAME MACHINE IN GAME SHOP
TOOTHED BELT
TONER REPLENISHING DEVICE
SECOND HIGHER HARMONIC GENERATING ELEMENT
SILVER HALIDE COLOR PHOTOGRAPHIC SENSITIVE MATERIAL
METHOD AND DEVICE FOR PREVENTING STRESS CORROSION NEAR WELDED JOINT
BALANCER SHAFT FOR INTERNAL COMBUSTION ENGINE
MULTIFUNCTIONAL VALVE
COOLING DEVICE FOR ELECTRIC MOTOR
PRESSURIZED STORAGE PUMP