Automatic rural crossbar switching system,申请号US19530331699-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	Automatic rural crossbar switching system
摘要
申请公布号	US2740841(A)	申请公布日期	1956.04.03
申请号	US19530331699	申请日期	1953.01.16
申请人	INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION	发明人	JR. JOHN DAVIDSON,
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

APARATO PARA PLEGAR CINTAS DE MANERA ORDENADA.

LIQUID-DROP DISCHARGING AND DRAWING DEVICE

Apparatus for working on a wheel

Paint kettle with brush holder

WIRELESS COMMUNICATION DEVICE

V Stol Aircraft

CONCEALED AND PREFERABLY LEAKTIGHT ELECTRICAL BUTT JOINT FOR PREFABRICATED LENGTHS OF ELECTRICAL DUCTING, PREASSEMBLED WITH ONE OF THE LENGTHS.

Method of and Apparatus for Monitoring the Performance of a Vehicle Braking System

Liquid mixing device for shower head

Light emitting device intensity correction

Folded leaflet and label for packaging

A gas-driven pumping device and a method for downhole pumping of a liquid in a well

Controlling a bias current for an optical source

Emergency position indicating device using RCS(radar cross section) characteristics

Electronic device with backlit display

External passageway for hydraulic kickover tool

A clamping device

An arm rest structure