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
Neutralized vacuum-tube circuits
摘要
申请公布号
US1789416(A)
申请公布日期
1931.01.20
申请号
US19270230910
申请日期
1927.11.03
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
POTTER RALPH K.
分类号
H03F1/16
主分类号
H03F1/16
代理机构
代理人
主权项
地址
您可能感兴趣的专利
ADVANCING WAVE TYPE SEMICONDUCTOR AMPLIFIER
BACKLIGHT STOP FOR OBJECTIVE LENS OF CAMERA
VAPORIZER FOR LIQUEFIED NATURAL GAS
METHOD FOR CORRECTING DEFECT IN LITHOGRAPHY MASK
SET AND METHOD FOR MAKING DENTURE BASE
MANUFACTURE OF THIN FILM TRANSISTOR MATRIX SUBSTRATE
ELECTROSTATIC RECORDING METHOD
PROCESS UNIT
SWITCHING TYPE VERTICAL DEFLECTOR
QUADRUPLE POLE MASS SPECTROGRAPH
ANTIBIOTICS
ANTIHYPER CHOLESTEROLEMIA DRUG
JUSHISEIKEIHINNOBUROOSEIKEIHOHOOYOBISOCHI
DRIVE CIRCUIT FOR MOTOR OF CONSTANT-VOLTAGE ONE-TO TWO-PHASE EXCITATION SYSTEM
MANUFACTURE OF LAMINATED SPIRAL PIPE
BLOW MOLDING METHOD
MOVEMENT DETECTOR
METHOD AND DEVICE FOR FORMING RESIST PATTERN
LENS BARREL
ABSENCE SETTING/CANCELING DEVICE FOR MOBILE STATION
