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
Improvements relating to electron discharge tubes or thermionic valves
摘要
申请公布号
GB386484(A)
申请公布日期
1933.01.19
申请号
GB19320009812
申请日期
1932.04.05
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H01J19/44
主分类号
H01J19/44
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Artificial silk filament and method of making same
Coin-controlled gravity-operated ticket-printing-and delivering scale
Exhaust box
Screw valve gate
Motor connection
Cushioning securing attachment
Sundial construction
Bearing lock
Brake
Synthetic methanol process
Machine for cutting the pile of weft-pile fabrics
Safety paying teller's window
Airplane inner-controlled spot lamp
Railway tank car underframe
Railway car underframe
Brake
Container
Driving head for support posts
Quick coupler valve
Fusible link
