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
Voice-frequency telephone signaling system
摘要
申请公布号
US2594719(A)
申请公布日期
1952.04.29
申请号
US19460664765
申请日期
1946.04.25
申请人
AUTOMATIC ELECTRIC LABORATORIES INC.
发明人
BEALE CHARLES EDMUND
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
METHOD FOR DENERVATING INSTANTANEOUSLY DISPATCHED FISH AND APPARATUS FOR DENERVATION
METHOD FOR SUCCULENT PLANT TISSUE CULTURE
Polyesterurethane condom
Electrical connector for connecting flexible printed circuit board
Copolymers and their use as contrast agents in magnetic resonance imaging and in other applications
Cross connection by using a switch request flag if a digital signal fails before supply to cross connected switch units
Method for simultaneous identification of differentially expressed mRNAs and measurement of relative concentrations
Determination of genetic sex in ruminants using Y-chromosome specific polynucleotides
OBJECT MOTION CONTROL DEVICE USING WIRE
PASTE TRANSFER DEVICE FOR CHIP PAPER
Data transmission control method and station used for the same
Flashlight with an enhanced spot beam and a fully illuminated broad beam
Control of microbial growth with lantibiotic/lysozyme formulations
Envelope stuffing machine
Transmitting and receiving apparatus
Enclosure with spill-resistant ventilation for electronic equipment
IMPROVEMENT OF SURFACE TREATMENT OF METAL
POLYOXYMETHYLENE RESIN COMPOSITION
CARBOHYDRATE IMITATION WITH ADHESION-PREVENTING CHARACTERISTICS
NEW 3-PHENYLSULFONYL-3,7-DIAZABICYCLO(3,3,1)NONANE COMPOUND,ITS PRODUCTION, AND ANTIARRHYTHMIC AGENT
