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
Acoustic device
摘要
申请公布号
US2104433(A)
申请公布日期
1938.01.04
申请号
US19340722269
申请日期
1934.04.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MARSHALL ROBERT N.
分类号
H04R1/22;H04R1/28
主分类号
H04R1/22
代理机构
代理人
主权项
地址
您可能感兴趣的专利
COMPOSICAO PARA ABSCISAO DE FRUTAS E PROCESSO PARA COLHEITA DAS MESMA
EQUIPAMENTO ESTATICO PARA ALIMENTACAO DE MECANISMOS DE TRACAO DE POLICORRENTES
DISJUNTOR DE FORCA HIBRIDO
COMPOSICAO DE COPOLIMERO PLASTIFICADA INTERNAMENTE
CONVERSOR DE TORQUE
DISPOSITIVO EM APARELHO DE TRITURACAO
PROCEDE ET APPAREIL DE POLYMERISATION AVEC AUTO-REFRIGERATION
ENZYME PREPARATION HAVING LLALPHAAAMINO ACYL AMIDASE ACTIVITY
PEELING METHOD OF LAVER FROM SCREEN
MEDICAL CAPSULE
METHOD OF PRODUCING DRIED SOLID FOOD
METHOD OF REMOVING NITROGEN OXIDES FROM EXHAUST GASES
SMALL ELECTRODE DEVICE
TOWING CURING PILLOW
DIGITAL PURSUIT SYSTEM FOR MOVEMENT TARGET
SOUND QUALITY ADJUSTMENT CIRCUIT
BELT GRINDING APPARATUS
OUTPUT CONTROLLING DEVICE FOR INDUCED HEATING COOKER
PREPARING OF LLAMINO ACIDS
ANTIIVIRUS AGENT TREATMENT FOR VIRUS INFFCTION AND PREVENTION METHOD
