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
US1802057(A)
申请公布日期
1931.04.21
申请号
US19290410213
申请日期
1929.11.27
申请人
JOE LAVELLE
发明人
LAVELLE JOE
分类号
E01B7/16
主分类号
E01B7/16
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Deck plank cover
I/O device layout during integrated circuit design
System and method for maintaining a knowledge base and evidence set
Integrated circuitry
Method for inhibiting skin lesion formation using histamine as the active ingredient
Method and apparatus for video compression using sequential frame cellular automata transforms
Organic electroluminescent devices and panels
Device for securing elements to a wire grid
Method and instrument for measuring vacuum ultraviolet light beam, method of producing device and optical exposure apparatus
Release coating for tapes
Method and apparatus for programming an amplifier
Methods for optimizing fischer-tropsch synthesis
Methods for volumetric tissue ablation
Loop structures for supporting multiple electrode elements
Flame-retardant additive for li-ion batteries
Lithium secondary battery with a lithium manganese oxide positive electrode
Apparatus and method for detection of foreign bodies in products
Scented ink composition and method of preparation
Anti-fog coating and coated film
Method of forging raw material for sintering and forging
