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
US2304220(A)
申请公布日期
1942.12.08
申请号
US19400356144
申请日期
1940.09.10
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
WALLER LEE R.
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
COLLOID PRODUCT, METHOD FOR PRODUCING SAME AND USE THEREOF
VARIABLE GAIN CONTROL NOSE WHEEL STEERING SYSTEM
MALLET WITH A CUTTING INSERT AND A BASIC ELEMENT
ENHANCED CHANNEL ESTIMATION FOR COMMUNICATION SYSTEM RECEIVER
APPARATUS FOR CHANNEL DISTORTION COMPENSATION
COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD, AND COMMUNICATION SYSTEM
A WASHING DEVICE OF SOLAR MODULE
Plate for enhancing brightness
Composition for Environmental-friendly molding blocks
unregisterd vehicles parking management system and method therefor
Image sensor and method for operating thereof in a semiconductor device
METHOD AND APPARATUS FOR UNIFORMLY IMPLANTING A WAFER WITH AN ION BEAM
METHOD OF AUTOMATICALLY CALIBRATING A VISUAL PARAMETER FOR AN IMAGING DEVICE
ASI Switcher for digital advertisement inserter
Magnetic Head Replacement Module, Payment Terminal Apparatus and Card Information Protection Method Using The Same
CARGO HANDLING SYSTEM AND METHOD FOR LIQUEFIED GAS CARRIER
REMOVAL TYPE OPTICAL FIBER SENSOR, MEASURING SYSTEM AND METHOD USING THE SAME
A lighting means having a function for heat breakdown protection
PROCESSES FOR PRODUCTION OF STEEL SHEETS FOR CANS
COPPER ALLOY FOR ELECTRONIC MATERIAL AND METHOD FOR THE SAME
