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
US1891423(A)
申请公布日期
1932.12.20
申请号
US19310577931
申请日期
1931.11.30
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
KAHN FREDERICK L.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
ON-VEHICLE INFORMATION TERMINAL
METHOD AND MATERIAL FOR CLEANING SUBSTRATE
COATING METHOD, COATING APPARATUS AND COATING TREATMENT PROGRAM
SOLID-STATE IMAGING DEVICE AND MANUFACTURING METHOD THEREFOR
PROTECTIVE EQUIPMENT FOR ELECTRIC WIRE TREATMENT AND PORTABLE COMMUNICATION APPARATUS EQUIPPED WITH THE SAME
METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE
METHOD OF MANUFACTURING CERAMIC PACKAGE
CHIP RESISTOR
NON-VOLATILE SEMICONDUCTOR STORAGE DEVICE AND METHOD OF MANUFACTURING SAME
DEVICE AND METHOD FOR CLEANING/DRYING WAFER
CONDUCTIVE PANEL MATERIAL AND ITS PRODUCTION PROCESS
PROCESS FOR FABRICATING III-V COMPOUND SEMICONDUCTOR OPTICAL DEVICE
SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF
ELECTRONIC PART
LAMINATED CERAMIC ELECTRONIC COMPONENT
SILICON WAFER AND MANUFACTURING METHOD THEREOF
MOS TRANSISTOR AND ITS FABRICATION PROCESS
ELECTROLYTIC SOLUTION
COMPOUND SEMICONDUCTOR SUBSTRATE AND ITS MANUFACTURING METHOD, AND SEMICONDUCTOR DEVICE
CATHODE HEAD WITH FILAMENT PROTECTION STRUCTURE
