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
CA344268(A)
申请公布日期
1934.08.28
申请号
CAD344268
申请日期
申请人
THE NORTHERN ELECTRIC COMPANY
发明人
JOHN A. BURGENER
分类号
主分类号
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Pressure monitoring apparatus
Air passage to facilitate withdrawal of liner from a wateright refuse bin
Rifrigerator ice-making facility
COMPOUND PIPE
FLUE GAS PROCESSING BY SEGMENTED HEAT EXCHANGER
BEND STRAIGHTENER FOR EMBEDDING VINYLCHLORIDE PIPE
NONCATALYTIC DENITRATOR AND NONCATALYTIC DENITRATION METHOD
AMMONIA INJECTOR OF DENITRATOR
SEMICONDUCTOR DEVICE AND MANUFACTURE THEREOF
BATCH TYPE ACTIVATED SLUDGE PROCESS FOR POLLUTED WATER
RADIO PACKET TRANSMITTER/RECEIVER
COLLIMATOR CHANGE CARRIAGE FOR SCINTILLATION CAMERA
METHOD AND DEVICE FOR ENCODING AND ENCODING MOTION PICTURE
FIELD EMISSION TYPE ELECTRON EMITTING ELEMENT AND ITS MANUFACTURE
THIN-FILM TRANSISTOR MATRIX AND ITS PRODUCTION
PHASE DIFFERENCE MEASURING DEVICE, AND ZERO ADJUSTING DEVICE AND METHOD THEREOF
AUTOMATIC BAGGING DEVICE WITH METAL-DETECTING MECHANISM
HUMAN BODY DETECTOR
INFORMATION RECORDING MEDIUM AND INFORMATION REPRODUCING DEVICE
MANUFACTURING METHOD OF PRINTED-WIRING BOARD HAVING ELECTROMAGNETIC WAVE SHIELD