NL37399C - - Google Patents
Info
- Publication number
- NL37399C NL37399C NL37399DA NL37399C NL 37399 C NL37399 C NL 37399C NL 37399D A NL37399D A NL 37399DA NL 37399 C NL37399 C NL 37399C
- 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 |
|---|---|---|---|
| DE723089X | 1931-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL37399C true NL37399C (xx) |
Family
ID=6632214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL37399D NL37399C (xx) | 1931-01-22 |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT131508B (xx) |
| FR (1) | FR723089A (xx) |
| NL (1) | NL37399C (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE746315C (de) * | 1934-06-22 | 1944-08-01 | Normalzeit G M B H | Schaltungsanordnung fuer Fernsprechnebenstellenanlagen mit Waehlerbetrieb |
-
0
- NL NL37399D patent/NL37399C/xx active
-
1931
- 1931-08-05 AT AT131508D patent/AT131508B/de active
- 1931-08-21 FR FR723089D patent/FR723089A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT131508B (de) | 1933-01-25 |
| FR723089A (fr) | 1932-04-02 |