Invention Grant
- Patent Title: Loud-speaker cabinet
- Patent Title (中): 扬声器柜
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Application No.: US9227949Application Date: 1949-05-10
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Publication No.: US2646852APublication Date: 1953-07-28
- Inventor: JOHN FORRESTER
- Applicant: JOHN FORRESTER
- Assignee: Forrester John
- Current Assignee: Forrester John
- Priority: GB1007948 1949-04-21
- Main IPC: H04R1/28
- IPC: H04R1/28
Information query
IPC分类:
