CH9138A - Microphone, effective over long distances - Google Patents
Microphone, effective over long distancesInfo
- Publication number
- CH9138A CH9138A CH9138A CH9138DA CH9138A CH 9138 A CH9138 A CH 9138A CH 9138 A CH9138 A CH 9138A CH 9138D A CH9138D A CH 9138DA CH 9138 A CH9138 A CH 9138A
- Authority
- CH
- Switzerland
- Prior art keywords
- microphone
- over long
- long distances
- effective over
- effective
- Prior art date
Links
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH9138T | 1894-09-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH9138A true CH9138A (en) | 1895-04-15 |
Family
ID=4198088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH9138A CH9138A (en) | 1894-09-10 | 1894-09-10 | Microphone, effective over long distances |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH9138A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE756614C (en) * | 1937-12-19 | 1952-10-13 | Helmut Dr Sell | Carbon microphone in which the resistance material is housed in a container freely supported by the membrane |
-
1894
- 1894-09-10 CH CH9138A patent/CH9138A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE756614C (en) * | 1937-12-19 | 1952-10-13 | Helmut Dr Sell | Carbon microphone in which the resistance material is housed in a container freely supported by the membrane |
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