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
Immediate ringing equipment for communication systems
摘要
申请公布号
US3378643(A)
申请公布日期
1968.04.16
申请号
US19640417444
申请日期
1964.12.10
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
JR. LEOPOLD F. GOELLER,
分类号
H04Q3/545
主分类号
H04Q3/545
代理机构
代理人
主权项
地址
您可能感兴趣的专利
SWITCHING DEVICE, IN PARTICULAR FOR OPTICAL APPLICATIONS
FABRIC ARTICLE TREATING SYSTEM
METHOD FOR DEPOSITION OF TRANSPARENT SILVER-CONTAINING METAL LAYERS
SUPPORT CHANNEL FOR USE WITH LIGHT FIBER
N-THIO-NICOTINAMIDE DERIVATIVES AND RELATED COMPOUNDS FOR USE AS PESTICIDES
METHOD AND APPARATUS FOR CALIBRATING X-RAY DETECTORS IN A CT-IMAGING SYSTEM
POLYURETHANE, METHOD FOR PRODUCTION AND USE THEREOF
PRE-EXPANDED POLYPROPYLENE RESIN BEAD AND MOLDED OBJECT OBTAINED THEREFROM BY IN-MOLD FOAMING
METHOD FOR DESIGNING LOW COST STATIC NETWORKS
APPARATUS AND METHODS FOR DEDICATED COMMAND PORT IN MEMORY CONTROLLERS
APPARATUS AND METHOD FOR MEASURING COLOUR
BOILER-STEAM GENERATOR
SLAT SWINGING MECH AND OPENING COVERNING DEVICE USING THE SAME
A LOCK FOR A SWINGING DOOR
TREATMENT OF UTERINE SEROUS PAPILLARY CANCER
NICOTINIC ACID-HETEROCYCLYL-AMIDES AND ANALOGOUS PYRIMIDINE DERIVATIVES SERVING AS PESTICIDES
COMPOSITIONS FOR THE TREATMENT AND PREVENTION OF PLANT PATHOGENS
METHODS FOR THE PURIFICATION OF LEVOFLOXACIN
PROCESS FOR THE FRACTIONATION OF OILSEED PRESS CAKES AND MEALS
DRUG DELIVERY DEVICES AND METHODS
