Four-wire signaling circuits,申请号US19380239005-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	Four-wire signaling circuits
摘要
申请公布号	US2207531(A)	申请公布日期	1940.07.09
申请号	US19380239005	申请日期	1938.11.05
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BOTSFORD NELSON
分类号	H04B1/58	主分类号	H04B1/58
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Starter for internal combustion engines

Improvements in and relating to heat transferring devices such as air preheaters

Improvements in and relating to egg preserving compositions

Improvements in arrangements for connecting electric cables

Improvements in means for securing tines on cultivators

Improvements in or connected with electric furnaces

Improvements in and connected with the under casing or grid structures for the main cylinders of carding engines and such like

Improvements in or relating to electric coupling elements

Improvements in devices for playing games

Improvements in electric induction motors

Improvements in and relating to methods of making enamelled wire insulated with vulcanised india-rubber

Improvements in or relating to jacquard mechanism for parallel knitting-machines

Improvements in electron discharge devices

Improvements in the manufacture of tire casings

Improvements in or relating to suction sweepers

Purgeur automatique

Procédé de fixation des montures pour peignes

Perfectionnements dans le guidage des traverses danseuses des bogies

Perfectionnements relatifs aux dispositifs permettant de réaliser certains mouvements mécaniques

Distributeur à estompe pour fard