Improvements in or relating to telephone systems,申请号GB19400000885-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	GB568287(A)	申请公布日期	1945.03.28
申请号	GB19400000885	申请日期	1940.01.15
申请人	GUY R. FOUNTAIN LIMITED;ALFRED EDWARD COURTENAY SNELL;HENRY JOHN HOULGATE	发明人
分类号	H04M1/60;H04M9/00	主分类号	H04M1/60
代理机构		代理人
主权项
地址

您可能感兴趣的专利

METHOD OF AND CIRCUITRY FOR INTERFACING AN ALARM SYSTEM LOCATED IN AN EXPLOSIVE AREA WITH A CENTRAL ALARM STATION LOCATED EXTERNALLY OF THIS AREA

METHOD OF OBTAINING NUTRIENTS IN PARTICULAR FOR BABIES

METHOD OF DETECTING INVISIBLE CRAKCS IN KIDNEY-BEAN INVOLUCRE

METHOD OF OBTAINING GRANULAR ACTIVE CARBONS WHILE USING A TARLESS CARBON DUST BINDING AGENT

METHOD OF OBTAINING AN AGENT FOR WASHING METAL SURFACES

METHOD OF ASSESSING DEGREE OF PREMATURATE WEAR OF A KINEMATIC PAIR: JOURNAL - BEARING SLEEVE

SPENNINGSDELER FOR MAALING AV HOEYE SPENNINGER OG TRANSIENTER PAA ELEKTRISKE KRAFTLINJER.

BANELENGDEREGULATOR FOR RINGLASERGYROSKOP.

BIS (P-ALKYLFENYLETYNYL) ANTRACENER OG ANVENDELSE DERAV SOM FLUORESCERENDE KOMPONENT I KJEMILUMINESCERENDE BLANDINGER.

PROCESS FOR PREPARING 1,3,5,-HEXAHYDRO - S - TRIAZINE DERIVATIVES

PRODUCTION OF MODIFIED HYDROXYETHYL CELLULOSE

HANDSTYRT SLIP- ELLER POLERVERKTYG.

FOERFARANDE FOER STERILISERING AV FOERPACKNINGSMATERIAL.

ANORDNING FOER ATT RETURNERA OCH ORDNA UPP KOEPVAGNAR.

REGELANORDNING FOER BEHAOLLARLOCK.

FOERFARANDE FOER VAERDERING AV SACKAROSHALTEN I NAERING.

FOERFARANDE OCH ANORDNING FOER UPPSAMLING AV OLJA.