FR460656A - Automatic switch for telephone currents - Google Patents
Automatic switch for telephone currentsInfo
- Publication number
- FR460656A FR460656A FR460656A FR460656DA FR460656A FR 460656 A FR460656 A FR 460656A FR 460656 A FR460656 A FR 460656A FR 460656D A FR460656D A FR 460656DA FR 460656 A FR460656 A FR 460656A
- Authority
- FR
- France
- Prior art keywords
- automatic switch
- telephone currents
- currents
- telephone
- automatic
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE460656X | 1912-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR460656A true FR460656A (en) | 1913-12-09 |
Family
ID=8901681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR460656A Expired FR460656A (en) | 1912-07-26 | 1913-07-22 | Automatic switch for telephone currents |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE293234C (en) |
FR (1) | FR460656A (en) |
-
0
- DE DENDAT293234D patent/DE293234C/de active Active
-
1913
- 1913-07-22 FR FR460656A patent/FR460656A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE293234C (en) |
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