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
Telephone system
摘要
申请公布号
US2254378(A)
申请公布日期
1941.09.02
申请号
US19400316867
申请日期
1940.02.02
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MALLINA RUDOLPH F.
分类号
H04M1/54
主分类号
H04M1/54
代理机构
代理人
主权项
地址
您可能感兴趣的专利
RAKE ATTACHMENT FOR A SKID STEER
Personal protection apparatus
Ice-hockey stick
Container liners
Glue joint and a joint production method
Improvements in the method and process of thalassotherapy
A system to be used for the determination of no levels in exhaled air and diagnostic methods for disorders related to abnormal no levels
Preparation and stabilisation of cells
Control apparatus with audible display
H2 antagonist-sucralfate-antiflatulent combinations
Air-drying alkyd resin and an emulsion thereof
Custom fit cap
Dust container for vacuum cleaners
Multiplex addressing
Compositions and method for modulating fertility
Powder-form cross-linked polymers capable of absorbing aqueous liquids and body fluids, method of preparing them and their use
H2 antagonist-gastrointestinal motility agent combinations
Headphone assembly
Purified components of mammalian transcription regulation complexes, and analogs
Hemoregulatory penta- or hexapeptides
