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
Vacuum-tube detector
摘要
申请公布号
US1760957(A)
申请公布日期
1930.06.03
申请号
US19250074334
申请日期
1925.12.09
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
OHL RUSSELL S.
分类号
H03D1/16
主分类号
H03D1/16
代理机构
代理人
主权项
地址
您可能感兴趣的专利
CONTROL METHOD OF COPYING MACHINE
PHOTOGRAPHING DEVICE
ACCOUNTING PROCESSING SYSTEM IN COIN ACCOUNTING PROCESSOR
SYSTEM SWITCHING SYSTEM
RADIOACTIVE DIAGNOSTIC DEVICE
TEMPERATURE CONTROLLER
FLEXIBLE I*O
BOOSTER VALVE
DEVICE FOR FIXING PLATE
COPYING MACHINE OF VARIABLE MAGNIFICATION
TRACTION ELEVATOR APPARATUS
GAS MANUFACTURE
Method for recouping combustion heat
Electrical power generating system
Physical exercise apparatus
Surveying instrument
Transcutaneous oxygen and local perfusion measurement
Herbicidal compound and method of use
Flow control device for use with a battery formation tub
Apparatus for collecting market survey data from universal product type coded items
