Invention Grant
- Patent Title: Magnetic structure for a loudspeaker
- Patent Title (中): 扬声器的磁性结构
-
Application No.: US44687154Application Date: 1954-07-30
-
Publication No.: US3247331APublication Date: 1966-04-19
- Inventor: CUNNINGHAM DAVID H
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US44687154 1954-07-30
- Main IPC: H04R9/02
- IPC: H04R9/02
Information query
