首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
Telephone system
摘要
申请公布号
US1889564(A)
申请公布日期
1932.11.29
申请号
US19300444022
申请日期
1930.04.14
申请人
ASSOCIATED TELEPHONE AND TELEGRAPH COMPANY
发明人
OSTLINE JOHN ELLIS;TAYLOR REGINALD;BEALE CHARLES EDMUND
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Drejelåsecylinder til en sikkerhedslås
CERNIERA PER ANTE O SPORTELLI
NOVEL POLYPEPTIDE AND NUCLEIC ACIDS ENCODING THE SAME
LINEA, METODO E STAZIONE DI LAVORAZIONE PER LA FORMATURA DI ELEMENTI DISCOIDALI DI PASTA ALIMENTARE, DEL TIPO PIZZA O SIMILARI.
STRUTTURA DI PRESSA PNEUMATICA, PARTICOLARMENTE PER LA PRESSATURA DI FRUTTA.
SISTEMA DI CONTROLLO DEI TUBOLARI UTILIZZATI PER LA PERFORQZIONE, DURANTE LA DISCESA E LA RISALITA NEL E DAL POZZO, PER EVIDENZIARE CRICCHE O DIFETTI OCCORSI DURANTE LA PERFORAZIONE.
SISTEMA E GIUNTO DI COLLEGAMENTO DEL DISPOSITIVO ACCENDITORE IN SENO AI FUOCHI D' ARTIFICIO.
JAW CRUSHER
ETCHANT AND METHOD OF ETCHING
SURFACE LIGHT SOURCE APPARATUS
Test Method of hall control station of elevator
A Rotary Concentric Plug
Method and system of measuring of electric voltage higher harmonic
Method for obtaining of (4S,5S)-5-(4'-methyl-3'-pentenyl)-4-hydroxy-5-methyldihydrofuran-2-one
Method for glycydyl production from glycerol monochlorohydrin
Trimethylamine derivatives of poly-cis and poly-trans line isoprene oligomers, method for their production and use
Method for sewage disposal, installation for sewage disposal and sewage disposal valve
New ionic vapours comprising (4-chloro-2-methylphenoxy)acetic anion and methods for production thereof
MOVING CURSOR IN A MOBILE COMMUNICATION TERMINAL WITH A NAVIGATION FUNCTION KEY
GAS MONITORING APPARATUS USED IN SEMICONDUCTOR MANUFACTURING PROGRESS