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
A band-pass filter for electrical communication systems
摘要
申请公布号
GB537439(A)
申请公布日期
1941.06.23
申请号
GB19400000903
申请日期
1940.09.15
申请人
SIDDHESHWARI PRASAD CHAKRAVARTI
发明人
分类号
H03H9/54;H03H11/10;H03H11/46
主分类号
H03H9/54
代理机构
代理人
主权项
地址
您可能感兴趣的专利
ESCALIER PREFABRIQUE A MOYENS DE MONTAGE REGLABLES
DIRECTIONAL COMPARISON BLOCKING PROTECTIVE RELAY SYSTEM
PROCESS FOR PREPARATION OF DERIVATIVES (1,2,4-TRIAZOLYLE)-2-PROPANOL
PILLOW WITH MIRROR SURFACE FOR FACE SUN-TANNING
AIRFIELD CONNECTOR
PROCESS FOR OBTAINING METAL PARTS OF COAL ASHES AND SIMULTANEOUSLY REMOVING SULFUR DIOXIDE FROM WASTE GASSES
APPARATUS FOR DIGITAL MEASURING OF ROTATING SPEED USING INCREMENTAL IMPULSE TRANSDUCER
PROCESS IN MAKING AND SELECTION OF OPTIMALLY COMBINED INSERTS FOR MAGNETOTHERAPY IN HUMAN MEDICINE
PROCESS FOR RECUPERATING PART OF USEFUL METALS IN SOILED COPPER RAW MATERIALS
DEVICE FOR TIGHTENING ROPES OF BELT CONVEYERS
ASSEMBLY OF SHIP'S PROPELLER AND WITH ASSOCIATED BLADE WHEEL
APPARATUS FOR MAKING DRILLED OPENINGS WITH BACK GROVE AND PLACING FASTENING ELEMENTS IN THOSE GROOVES
EXTRAITS DE CYANOBACTERIES FILAMENTEUSES, LEUR PROCEDE DE PREPARATION ET LEUR ACTIVITE EN TANT QUE FACTEUR DE CROISSANCE
NOVEL 3-AROYL-6,7-DIHYDRO-5H-PYRROLO (1,2-C) IMIDAZOLE-7-CARBOXYLIC ACID DERIVATIVES
BOUCHON DISTRIBUTEUR EN DEUX PIECES
KOKINZOKUGANJUSHOKUBAINYORUSEKITAN*ABURAKONGOBUTSUNOZENSHINRYUBUNKAI
PERMANENT MAGNET ARRANGEMENT
PLANCHE A AIGUILLES POUR MACHINE A AIGUILLETER UNE NAPPE FIBREUSE
LYSOSPHINGOLIPID DERIVATIVES
MEDICINAL AEROSOL FORMULATIONS
