NL26841C - - Google Patents
Info
- Publication number
- NL26841C NL26841C NL26841DA NL26841C NL 26841 C NL26841 C NL 26841C NL 26841D A NL26841D A NL 26841DA NL 26841 C NL26841 C NL 26841C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES81444D DE515223C (de) | 1927-08-30 | 1927-08-30 | Schaltungsanordnung zur Herstellung von Rueckfrageverbindungen in Fernsprechanlagen mit Waehlerbetrieb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL26841C true NL26841C (en:Method) |
Family
ID=7509612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL26841D NL26841C (en:Method) | 1927-08-30 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE515223C (en:Method) |
| NL (1) | NL26841C (en:Method) |
-
0
- NL NL26841D patent/NL26841C/xx active
-
1927
- 1927-08-30 DE DES81444D patent/DE515223C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE515223C (de) | 1931-01-10 |