NL55659C - - Google Patents
Info
- Publication number
- NL55659C NL55659C NL55659DA NL55659C NL 55659 C NL55659 C NL 55659C NL 55659D A NL55659D A NL 55659DA NL 55659 C NL55659 C NL 55659C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/16—Monitoring arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE214508X | 1939-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL55659C true NL55659C (it) |
Family
ID=5819084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL55659D NL55659C (it) | 1939-01-24 |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH214508A (it) |
| FR (1) | FR868660A (it) |
| NL (1) | NL55659C (it) |
-
0
- NL NL55659D patent/NL55659C/xx active
-
1939
- 1939-12-22 CH CH214508D patent/CH214508A/de unknown
-
1940
- 1940-12-30 FR FR868660D patent/FR868660A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR868660A (fr) | 1942-01-12 |
| CH214508A (de) | 1941-04-30 |