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
Gain control circuit
摘要
申请公布号
US2139236(A)
申请公布日期
1938.12.06
申请号
US19370145202
申请日期
1937.05.28
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KINZER JOHN P.;WILSON IRA G.
分类号
H04B3/11
主分类号
H04B3/11
代理机构
代理人
主权项
地址
您可能感兴趣的专利
FILTERS
METHODS AND APPARATUS FOR TREATING SEWAGE
WINDOW CONSTRUCTION
AMINO-ETHERS AND PROCESSES FOR THEIR MANUFACTURE
METHODS OF PRODUCING VANILLIN
COMPOSITIONS AND PROCESSES FOR CURING LUMBER AND PRODUCTS
FUEL-FEEDING SYSTEMS FOR HEATERS
ARC WELDING
CYLINDER TYPE PAPER MACHINES
Door hinge
Footwear
Isomerization of olefins
Metal oxide treatment of 3-formoxy steroids
Fuel pump control for gas turbine responsive to intake air pressure and temperature
Double acting pump
Rotary power generator
Method of manufacturing gloves
Apparatus for spinning artificial filaments
Apparatus for embalming
Eyeshield for headgear
