-
公开(公告)号：US1976385A
公开(公告)日：1934-10-09
申请号：US35535429
申请日：1929-04-15
Applicant: RCA CORP
Inventor： JOHANNES BRUIJNES , WILHELM MULDER JOHANNES GIJSBE , EKKO OOSTERHUIS
IPC: H01J21/20
CPC classification number: H01J21/20 , H01J2893/003
-
2.发明授权Diaphragm or diaphragm mount for loudspeakers or other sound reproducing devices 失效用于扬声器或其他声音再现装置的隔膜或隔膜安装
公开(公告)号：US1877804A
公开(公告)日：1932-09-20
申请号：US20593627
申请日：1927-07-15
Applicant: RCA CORP
Inventor： JOHANNES BRUIJNES , URK AREND THOMAS VAN
IPC: H04R7/20
CPC classification number: H04R7/20
-
Search Results
2
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
