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
US1763157(A)
申请公布日期
1930.06.10
申请号
US19290360439
申请日期
1929.05.04
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KING GERALD V.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Wafer unloading system and wafer processing equipment including the same
Modular gondola drive for a floating device
Electrical connector and handheld electronic device
Locking device for a connecting arrangement
Plug-type connector having a radially acting latching device
USB connector, USB housing, and wireless modem
Pre-charged prophy angle
Side gate nozzle assembly
Vane rotary compressor
Balance plate assembly for a fluid device
Transportable medical air compressor
Blade
Gas turbine engine sealing structure
Concentrically loaded, adjustable piering system
Antiperspirant compositions and methods for making same
Optical element and system using the same
Double roller cage for a double-row cylinder roller bearing with mass compensation
Motion guide device and method of producing the same
X-ray imaging system and positioning method of the same
Illumination optical device and virtual image display