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 in optical sound-reproducing apparatus
摘要
申请公布号
GB343132(A)
申请公布日期
1931.02.11
申请号
GB19290034371
申请日期
1929.11.11
申请人
FREEMAN HARRISON OWENS
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
ASH MELTING FURNACE
APPARATUS FOR SUPPLYING COMBUSTION AIR TO INCINERATOR CENTER
STRAINER AND STOP VALVE HAVING REVERSE FLOW PREVENTIVE FUNCTION
SHIFT CONTROL METHOD FOR MOTOR-DRIVEN TRANSMISSION DEVICE
REGULATION-TYPE COIL
LOCATING METHOD FOR AIR CYLINDER
ELECTRIC FAN
TUMBLE SHUTOFF VALVE
BALL VALVE
PASSAGE SELECTOR DEVICE OF WATER COCK
VIBRATION SENSITIVE INSTANTANEOUS WORKING ACTUATOR
AIR BLOWER
ENCLOSED SCROLL COMPRESSOR
SCROLL COMPRESSOR
GEAR PUMP
TAIL STRUCTURE OF SHIELD EXCAVATOR FOR INTAKE TUNNEL
LINING DEVICE
EXCAVATING DEVICE
SELF-STANDING CONSTRUCTION METHOD FOR PERFORATED WALL
EDGE-REINFORCED GLASS, AND ITS MANUFACTURE
