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
Signaling system
摘要
申请公布号
US2183708(A)
申请公布日期
1939.12.19
申请号
US19380193650
申请日期
1938.03.03
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CUMMINGS GEORGE C.;HEARN RICHARD B.
分类号
H04L5/12;H04L5/14;H04L25/04
主分类号
H04L5/12
代理机构
代理人
主权项
地址
您可能感兴趣的专利
SURGE ARRESTER
EXTENDABLE SEAT ARRANGEMENT FOR VEHICLES
CORD OPERATED VERTICAL BLINDS
BONSAI WIRE
UNDERWATER SADDLE
SUN VISOR FOR MOTOR VEHICLES
HIP JOINT FOR PROSTHETIC LEG
RAIL CLIPS
IMPROVEMENTS IN BRACELETS/NECKLACES
STAINED GLASS
RE-ENTRANT STRUCTURAL MEMBER
TRAILERS & TRANSPORT VEHICLES
MULTI PURPOSE SECURITY BARRIER
AXLE ASSEMBLY INCLUDING INTERNAL HYDRAULIC DRIVE
CLEANSING EQUIPMENT
PRESSURISED STRUCTURAL TUBULAR ELEMENTS
ANTI SLAM DOOR DAMPER DEVICE
IMPROVED OVERBASED MAGNESIUM SULPHONATE
PLASTIC TUBE SECURING MEANS
ASSAY & DIAGNOSIS
