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 frog
摘要
申请公布号
US2405407(A)
申请公布日期
1946.08.06
申请号
US19410406619
申请日期
1941.08.13
申请人
CONLEY JOHN E
发明人
CONLEY JOHN E.
分类号
E01B7/14
主分类号
E01B7/14
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Improvements in electromagnetic switches
Pharmaceutical radioactive capsules and method of producing same
Improvements relating to illuminating devices
Improvements in variable speed gearing
Improvements in or relating to means for controlling the movements of elements so that they describe arcs of large radius
Improvements in or relating to the preparation of polychlorophenols
Improvements in or relating to shirt collars
Improvements in or relating to shirt collars
Method for indicating the content of a volatile combustible liquid in a mixture containing said liquid, and apparatus therefor
Improved rear wheel suspension for motor driven cycles
Improved fluid pressure power steering mechanisms for motor vehicles
A tape motor
Improvements in or relating to voltage regulating circuit arrangements
Improvements in or relating to the sealing of cracks in structures
Improvements in or relating to cover-plates for stoves, ovens, ranges and the like
Improvements in or relating to photo-telegraph or facsimile receivers
Improvements relating to valve chain circuits
Improvements in and relating to circuits employing dry-plate rectifier elements
Improvements in or relating to load-share responsive devices for paralleled systems of three-phase alternators
Contacting device for a dynamo-electric igniting machine driven by a mainspring
