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
Signaling system
摘要
申请公布号
US2368056(A)
申请公布日期
1945.01.23
申请号
US19430499200
申请日期
1943.08.19
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
WALSH JOHN G.
分类号
H04M19/02
主分类号
H04M19/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
METHOD AND DEVICE FOR ELIMINATING ROAD SIGN
STRUCTURE OF ASSEMBLING SHEET PILE AND ITS EXECUTION METHOD
STRUCTURE OF FIXING LOWER PORTION OF TEMPORARY FRAME IN WORK OF EXECUTING CLOTH FOUNDATION
STRUCTURE OF FIXING LOWER PORTION OF TEMPORARY FRAME IN WORK OF EXECUTING CLOTH FOUNDATION
STRUT FOR HANDRAIL FOR BUILDING
DEVICE OF AUTOMATICALLY STACKING CLOTH CONTAINER
PAPER PIECES FEEDING MECHANISM
DIAGONAL TENSION DETECTOR
ELEVATOR CONTROLLER
CEAR CRANK OF BICYCLE
PREPARATION OF SHOCK ABSORBING PAD
SUPERHARD ROLL FOR ROLLING USE
GAS CUTTING METHOD FOR PIPE
NNARYLLDIAZA CYCLIC COMPOUND * PHARMACEUTICAL COMPOSITION AND PRODUCTION
WEED CONTROL METHOD OF SOYBEAN FARM AND NOVEL BENZYL COMPOUND
SYSTEME DE DETECTION DE NIVEAU DE SURFACE D'UN METAL EN FUSION
ILDFAST MATERIALEBLANDING OG FREMGANGSMAADE TIL FREMSTILLING AF SAMME
PURIFICATION OF NATURAL GAS INCLUDING THE STEP OF A CRYOGENIC DISTILLATION
CELL CUTTORE SYSTEM BASED ON DIPLOID CELLS FOR CULTIVATION OF VIRUSES:PRODUCTION OF VACCINES
PROCEDE ET SYSTEME DE COMBUSTION A LIT FLUIDE AVEC SECHAGE PREALABLE D'UNE CHARGE HUMIDE EN UTILISANT UN LIT DE SABLE
