Invention Grant
- Patent Title: Acoustic device
-
Application No.: US12652326Application Date: 1926-08-02
-
Publication No.: US1700457APublication Date: 1929-01-29
- Inventor: THURAS ALBERT L
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US12652326 1926-08-02
- Main IPC: H04R1/38
- IPC: H04R1/38
Public/Granted literature
- US20100171784A1 IMAGE RECORDING APPARATUS Public/Granted day:2010-07-08
Information query
IPC分类:
