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
ANSWER TONE DETECTION CIRCUIT
摘要
申请公布号
US3536839(A)
申请公布日期
1970.10.27
申请号
USD3536839
申请日期
1968.10.11
申请人
BELL TELEPHONE LAB. INC.
发明人
GERARD C. PRINS
分类号
H04M3/64;H04M11/04;(IPC1-7):H04M11/00
主分类号
H04M3/64
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Cutting insert for machining tools
Connector for hanging an article like a picture from a wire and a counterpart for securing the connector
Process for preparing a device to produce hydrogen
INTERMEDIATE MARKER, METHOD AND DEVICE FOR PREPARING A DOCUMENT BEARING VARIABLE MARKINGS
Process for manufacturing ceramic materials having adjustable coefficient of thermal expansion and their use
INTEGRATED CIRCUIT DEVICE WHICH IS SECURED AGAINST ATTACKS RESULTING FROM CONTROLLED DESTRUCTION OF AN ADDITIONAL LAYER
Needlepunched und thermal bonded nonwoven fabric, process and use
Delta 7 and delta 22 cholesterol desaturases from ciliata phylum, and uses
METHOD FOR COATING CHEESE AND RESULTING COATED CHEESE
DISTRIBUTED, INTERACTIVE TELEVISION PROGRAM GUIDE; SYSTEM AND METHOD
Method of conducting transactions
SILOXANE-BASED LUBRICATING COMPOSITION, NOT RELEASING HYDROGEN, PREPARATION METHOD AND USE THEREOF
DIHYDRO-1,3,5-TRIAZINE AMINE DERIVATIVES AND THEIR THERAPEUTIC USES
Color liquid-crystal panel and method for manufacturing the same
Non-woven fabric
Feeding device for biogas installation
Device for addition of biomass to a fermenter making part of biogas plant
CONNECTION DEVICE FOR A FLUID LINE
构件或带有这种构件的结构和所用的夹件
串联型电能质量补偿器的电压补偿方法
