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
Hearing aid
摘要
申请公布号
GB463666(A)
申请公布日期
1937.04.05
申请号
GB19350027507
申请日期
1935.10.04
申请人
SONOTONE CORPORATION
发明人
分类号
H04R3/04;H04R23/02
主分类号
H04R3/04
代理机构
代理人
主权项
地址
您可能感兴趣的专利
CURRENT FEEDBACK TYPE TRANSISTOR DRIVING CIRCUIT
LINEAR INDUCTION MOTOR WITH MAGNETICALLY STOPPING POSITIONING FUNCTION OF SECONDARY CONDUCTOR
MANUFACTURE OF INSULATED COIL
(A) ;DEALKYLATION OF TERTIARY AMINE
INTERRUPTION CONTROLLING SYSTEM
MAGNETIC FLUID RECORDER
GLASS FIBER REINFORCED POLYPROPYLENE COMPOSITION
PRODUCTION OF POLYOLEFIN
THERMOELECTRIC BATTERY
TANK FOR OIL-IMMERSED ELECTRICAL MACHINERY AND APPARATUS
OIL DRAINING DEVICE FOR OIL-IMMERSED ELECTRIC APPARATUS
ANALOG-TO-DIGITAL CONVERTER
LOW-PRESSURE STEAM ELECTRIC-DISCHARGE LAMP
COMBUSTION CHAMBER FOR INTERNAL COMBUSTION ENGINE
(A) ;METHOD AND DEVICE FOR MANUFACTURING WOUND DRUM BODY REINFORCED BY FIBER
RADIATION MAINTENANCE SYSTEM
Ceramic hydrogen ion conductor and its preparation.
DIESEL ENGINE WITH SWIRL CHAMBER
METHOD OF CONTROLLING SUPERCHARGING PRESSURE OF ENGINE WITH SUPERCHARGER
IMMERSION NOZZLE FOR CONTINUOUS CASTING
