SU32381A1 - Acoustic signaling device - Google Patents
Acoustic signaling deviceInfo
- Publication number
- SU32381A1 SU32381A1 SU121272A SU121272A SU32381A1 SU 32381 A1 SU32381 A1 SU 32381A1 SU 121272 A SU121272 A SU 121272A SU 121272 A SU121272 A SU 121272A SU 32381 A1 SU32381 A1 SU 32381A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- signaling device
- acoustic signaling
- acoustic
- spark
- type
- Prior art date
Links
Landscapes
- Interface Circuits In Exchanges (AREA)
Description
568568
Тип. «ИскраType of. "Spark
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU121272A SU32381A1 (en) | 1932-12-31 | 1932-12-31 | Acoustic signaling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU121272A SU32381A1 (en) | 1932-12-31 | 1932-12-31 | Acoustic signaling device |
Publications (1)
Publication Number | Publication Date |
---|---|
SU32381A1 true SU32381A1 (en) | 1933-09-30 |
Family
ID=48349561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU121272A SU32381A1 (en) | 1932-12-31 | 1932-12-31 | Acoustic signaling device |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU32381A1 (en) |
-
1932
- 1932-12-31 SU SU121272A patent/SU32381A1/en active
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