NL56647C - - Google Patents
Info
- Publication number
- NL56647C NL56647C NL56647DA NL56647C NL 56647 C NL56647 C NL 56647C NL 56647D A NL56647D A NL 56647DA NL 56647 C NL56647 C NL 56647C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
- H04J1/085—Terminal station; Combined modulator and demodulator circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/78—Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE219526X | 1939-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL56647C true NL56647C (xx) |
Family
ID=5831924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL56647D NL56647C (xx) | 1939-12-08 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2330612A (xx) |
| BE (1) | BE439763A (xx) |
| CH (1) | CH219526A (xx) |
| FR (1) | FR868502A (xx) |
| NL (1) | NL56647C (xx) |
-
0
- BE BE439763D patent/BE439763A/xx unknown
- NL NL56647D patent/NL56647C/xx active
-
1940
- 1940-11-04 CH CH219526D patent/CH219526A/de unknown
- 1940-11-27 US US367415A patent/US2330612A/en not_active Expired - Lifetime
- 1940-12-28 FR FR868502D patent/FR868502A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR868502A (fr) | 1942-01-05 |
| BE439763A (xx) | |
| US2330612A (en) | 1943-09-28 |
| CH219526A (de) | 1942-02-15 |