NL35097C - - Google Patents
Info
- Publication number
- NL35097C NL35097C NL35097DA NL35097C NL 35097 C NL35097 C NL 35097C NL 35097D A NL35097D A NL 35097DA NL 35097 C NL35097 C NL 35097C
- 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)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE647907T | 1930-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL35097C true NL35097C (en:Method) |
Family
ID=6581056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL35097D NL35097C (en:Method) | 1930-09-22 |
Country Status (4)
| Country | Link |
|---|---|
| AT (1) | AT129200B (en:Method) |
| CH (1) | CH157794A (en:Method) |
| DE (1) | DE647907C (en:Method) |
| NL (1) | NL35097C (en:Method) |
-
0
- NL NL35097D patent/NL35097C/xx active
-
1930
- 1930-09-22 DE DE1930647907D patent/DE647907C/de not_active Expired
-
1931
- 1931-01-16 AT AT129200D patent/AT129200B/de active
- 1931-08-15 CH CH157794D patent/CH157794A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH157794A (de) | 1932-10-15 |
| DE647907C (de) | 1937-07-16 |
| AT129200B (de) | 1932-07-11 |