Improvements in or relating to telephone systems,申请号GB19380029271-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	Improvements in or relating to telephone systems
摘要
申请公布号	GB519256(A)	申请公布日期	1940.03.20
申请号	GB19380029271	申请日期	1938.10.10
申请人	WILLIAM KENNETH BRASHER;BENJAMIN FRANCIS MOSS	发明人
分类号	H04M15/08	主分类号	H04M15/08
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Improvements in or relating to gas seals

Adamantanecarboxylic acid derivatives

Process for the preparation of tetrafluoroethylene oxide

3-aminopyrazinoic acid n-oxide compounds and their derivatives

Improvements in or relating to doors for dishwashing machines

Pyrogenic silica production

Improvements relating to automatic piston-casting machines

Device for regulating the pressure medium outlet of servomotors

PROCESS FOR THE PRODUCTION OF TRANS-4-AMINOMETHYLCYCLOHEXANE - 1-CARBOXYLIC ACID

Improvements relating to drying and ironing machines

Refrigeration system

Process for the preservation of polyolefines and polyamides

Improvements in or relating to plunger pumps

Modular suppression tanks for nuclear containment structures

Measurement and detection of low power a.c. signals

Procédé de fabrication des pneumatiques

Procédé et dispositif pour durcir des parties prédéterminées d'un élément de rembourrage en polyuréthane élastique poreux

Vernis photopolymérisable à base d'esters d'alcool polyvinilique

Procédé pour la préparation de dispersions aqueuses de polymères de propionate de vinyle