NL57012C - - Google Patents
Info
- Publication number
- NL57012C NL57012C NL57012DC NL57012C NL 57012 C NL57012 C NL 57012C NL 57012D C NL57012D C NL 57012DC NL 57012 C NL57012 C NL 57012C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
-
- 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
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
-
- 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
- H04M3/42221—Conversation recording systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL309354X | 1942-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL57012C true NL57012C (en:Method) |
Family
ID=19783577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL57012D NL57012C (en:Method) | 1942-05-02 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE483450A (en:Method) |
| CH (1) | CH309354A (en:Method) |
| DE (1) | DE851825C (en:Method) |
| FR (1) | FR958997A (en:Method) |
| NL (1) | NL57012C (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE548354A (en:Method) * | 1955-06-06 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2056277A (en) * | 1935-07-24 | 1936-10-06 | Telegraph repeating system | |
| US2149386A (en) * | 1936-04-02 | 1939-03-07 | Teletype Corp | Intercommunicating and broadcasting switchboard |
| BE428135A (en:Method) * | 1937-05-21 |
-
0
- NL NL57012D patent/NL57012C/xx active
- FR FR958997D patent/FR958997A/fr not_active Expired
- BE BE483450D patent/BE483450A/xx unknown
-
1947
- 1947-12-19 CH CH309354D patent/CH309354A/fr unknown
-
1950
- 1950-06-18 DE DEST1336A patent/DE851825C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR958997A (en:Method) | 1950-03-22 |
| DE851825C (de) | 1952-10-09 |
| CH309354A (fr) | 1955-08-31 |
| BE483450A (en:Method) |