DE190105C - - Google Patents
Info
- Publication number
- DE190105C DE190105C DENDAT190105D DE190105DA DE190105C DE 190105 C DE190105 C DE 190105C DE NDAT190105 D DENDAT190105 D DE NDAT190105D DE 190105D A DE190105D A DE 190105DA DE 190105 C DE190105 C DE 190105C
- Authority
- DE
- Germany
- Prior art keywords
- horn
- telephone
- microphone
- streets
- conically
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE190105C true DE190105C (OSRAM) |
Family
ID=453591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT190105D Active DE190105C (OSRAM) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE190105C (OSRAM) |
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0
- DE DENDAT190105D patent/DE190105C/de active Active
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