Improvements in or relating to electro-acoustic devices particularly for telephone systems,申请号GB19390022318-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 electro-acoustic devices particularly for telephone systems
摘要
申请公布号	GB536092(A)	申请公布日期	1941.05.02
申请号	GB19390022318	申请日期	1939.08.01
申请人	STANDARD TELEPHONES AND CABLES LIMITED;PERCY ARTHUR CHILDS	发明人
分类号	H04M1/03;H04R11/06	主分类号	H04M1/03
代理机构		代理人
主权项
地址

您可能感兴趣的专利

DISPOSITIF D'ARTICULATION ACTIF A COMPLIANCE

NOUVEAUX DERIVES D'ACIDES ARYLOXYBENZOIQUES, ET LEUR UTILISATION COMME HERBICIDES

MOTEUR ACTIONNE PAR L'AIR

DISPOSITIF POUR LE REGLAGE DES ARBRES DE TRANSMISSION

SUPPORT D'ENREGISTREMENT MAGNETIQUE COMPORTANT UN REVETEMENT COMPRENANT DU TITANATE D'ALUMINIUM

POINCON D'EMBOUTISSAGE DE FEUILLES MINCES

Femoral rod with flexible contacts for hip prosthesis

DISPOSITIF DE POSITIONNEMENT POUR TRANSMISSION A GALET

Radiological method and apparatus for studying seeds using a substance opaque to radiation

Heat exchanger, in particular radiator for motor vehicle engine cooling circuit

Installation for deep-freezing and for preserving foodstuffs.

Burner for the gasification of waste materials comprising a regulating device for the supply of fuel.

Improved standardised glazed frame for accepting thicker glazing

Mechanism for adjusting the position of the upper hook in overlocking machines

Process and device for the manufacture of granulates from at least one liquefied solid

Internal combustion piston engines especially intended for motor vehicles

ENSEMBLE GUIDON/PIVOT DE FOURCHE D'UN CYCLE A PROFIL AERODYNAMIQUE

APPAREIL DE DIRECTION ASSISTEE POUR TRACTEUR

MACHINE AUTOMATIQUE DE NETTOYAGE ULTRASONIQUE

Method and compositions for colouring superficial body growths