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
US1960883(A)
申请公布日期
1934.05.29
申请号
US19300503981
申请日期
1930.12.22
申请人
KELLOGG SWITCHBOARD AND SUPPLY COMPANY
发明人
WALLACE BERT A.
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
POLYMER, POLYELECTROLYTE, AND FUEL CELL EMPLOYING THE SAME
CELL SENSOR HAVING MULTIFUNCTIONAL REACTIONS FOR THE DEFINITION OF QUALITY CRITERIA DURING THE PRODUCTION OF MATERIALS
HYDROGEN GENERATING APPARATUS AND FUEL CELL SYSTEM
FUEL CELL SYSTEM
Coating of Household Articles by Means of Thermoplastic Elastomers
APPARATUS, METHOD, AND COMPUTER PROGRAM FOR PROCESSING INFORMATION AND RECORDING MEDIUM STORING COMPUTER PROGRAM
HPNA HUB
Parallel bit test circuit and method
Non-Volatile Memory With Reduced Erase/Write Cycling During Trimming of Initial Programming Voltage
Data Processor
BAD VIDEO EDIT DETECTION
Method and apparatus for providing uninterruptible power
Unified user work environment for surfacing cross document relationships and componentized functionality
Driver Circuit
Photolithography Apparatus Having Mirror for Correcting Aberrations in Optical Illumination System and Mirror Having Aberration Correcting Part
POWER AMPLIFIER
Semiconductor light emitting device
METHOD AND APPARATUS TO OPTIMIZE ELECTRODE PLACEMENT FOR NEUROLOGICAL STIMULATION
LOW-COMPATIBLE ACTIVE PRINCIPLES IN BIPARTITE BAG
UNIFIED CONTACT DATABASE
