FR703714A - Vibrating membrane for phonic devices - Google Patents
Vibrating membrane for phonic devicesInfo
- Publication number
- FR703714A FR703714A FR703714DA FR703714A FR 703714 A FR703714 A FR 703714A FR 703714D A FR703714D A FR 703714DA FR 703714 A FR703714 A FR 703714A
- Authority
- FR
- France
- Prior art keywords
- vibrating membrane
- phonic
- devices
- phonic devices
- vibrating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
- B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE703714X | 1929-10-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR703714A true FR703714A (en) | 1931-05-05 |
Family
ID=6614829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR703714D Expired FR703714A (en) | 1929-10-15 | 1930-10-15 | Vibrating membrane for phonic devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR703714A (en) |
-
1930
- 1930-10-15 FR FR703714D patent/FR703714A/en not_active Expired
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