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
US2517516(A)
申请公布日期
1950.08.01
申请号
US19470749758
申请日期
1947.05.22
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
WICKS JOHN;GRANDSTAFF OTHO D.
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
Push-out of low priority signals from switch buffers
High read speed multivalued read only memory device
Circuitry for controlling a threshold voltage in a flash memory cell
Double Impatiens plant named 'Tioga Light Pink'
Nectarine tree honey blaze
Kalanchoe plant named 'Alexandra'
Electronic devices having an array with shared column conductors
Magnetometric sensor magnetically isolated two regions formed of spin-polarized material and magnetic head using the same
Exposure apparatus with a PLZT shutter which received light from a projecting means capable of sequentially generating red, blue and green light
Lubricated textile spinning machinery parts
Percutaneous atrial line ablation catheter
Adjustable basketball backboard support system
GAS BAG FOR RESTRAINING DEVICE FOR VEHICULAR OCCUPANT AND RESTRAINING DEVICE
Process for forming a semiconductor device and a static-random-access memory cell
NON-CONTACT MECHANICAL SEAL
CONSTITUENT ELEMENT
Disconnector for a metal encapsulated, gas insulated high voltage switchgear
Optical device and fusion seal
Method of fabricating a stacked capacitor for a DRAM cell by plasma etching
IMAGE PICKUP DEVICE