DE173531C - - Google Patents
Info
- Publication number
- DE173531C DE173531C DENDAT173531D DE173531DA DE173531C DE 173531 C DE173531 C DE 173531C DE NDAT173531 D DENDAT173531 D DE NDAT173531D DE 173531D A DE173531D A DE 173531DA DE 173531 C DE173531 C DE 173531C
- Authority
- DE
- Germany
- Prior art keywords
- battery
- line
- relay
- call
- circuit
- 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.)
- Active
Links
- 230000010287 polarization Effects 0.000 claims description 6
- 239000003550 marker Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 230000003313 weakening effect Effects 0.000 claims 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE173531C true DE173531C (cs) |
Family
ID=438332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT173531D Active DE173531C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE173531C (cs) |
-
0
- DE DENDAT173531D patent/DE173531C/de active Active
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