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 telephone instruments
摘要
申请公布号
GB334294(A)
申请公布日期
1930.09.04
申请号
GB19290017458
申请日期
1929.06.06
申请人
THE MULLARD RADIO VALVE COMPANY LIMITED;CHARLES FREDERIC MARCHANT HAYES
发明人
分类号
H04R7/18;H04R7/20
主分类号
H04R7/18
代理机构
代理人
主权项
地址
您可能感兴趣的专利
AZOPHENYL COMPOUNDS
IMPROVEMENTS IN AND RELATING TO COMPOSITE BEAMS
CONNECTOR BETWEEN A TOILET SEAT/COVER AND THE TOILET BOWL
BONDING ADDITIVES FOR REFRACTORY METALLIZATION INKS
IMPROVED INLET SYSTEM FOR GAS SCRUBBER
WATER TANK ASSEMBLY
PROCESS AND DEVICE FOR GENERATING HEAT THROUGH THE FLAMELESS BURNING OF A FUEL IN A GAS CURRENT
A VARIABLE DIAMETER PULLEY HAVING EXTENDIBLE ELEMENTS
DOOR STOP DEVICE, ESPECIALLY FOR VEHICLE DOORS
FURNITURE UPHOLSTERY APPARATUS AND METHODS
METAL INFILTRATION APPARATUS, METHODS AND COMPOSITES OBTAINED THEREBY
AIR-FUEL RATIO CONTROL SYSTEM FOR AN AUTOMOTIVE ENGINE
INSTALLATION FOR RESTING AND LYING DOWN, PREFERABLY FOR A BED
ASTIGMATISM GENERATOR
SYSTEM FOR MAINTAINING PRESSURE IN AN INJECTION MOLDING MACHINE
AN OPTICAL FIBER COATED WITH AN ORGANOPOLYSILOXANE CURABLE WITH ACTINIC RAYS
METHOD FOR MANUFACTURING A TYRE ON A RIGID SUPPORT USING RUBBERY PRODUCTS, APPLYING APPARATUS ACCORDING TO SUCH A METHOD AND MACHINE USING SUCH AN APPARATUS
HEAT SENSITIVE VALVE
APPARATUS AND METHOD FOR CUTTING AND UNBONDING ELASTIC BANDS
FLUID DISTRIBUTION BY MULTIPLE PIPES
