NL56358C - - Google Patents
Info
- Publication number
- NL56358C NL56358C NL56358DA NL56358C NL 56358 C NL56358 C NL 56358C NL 56358D A NL56358D A NL 56358DA NL 56358 C NL56358 C NL 56358C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2250769X | 1937-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL56358C true NL56358C (en:Method) |
Family
ID=4568218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL56358D NL56358C (en:Method) | 1937-12-11 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2250769A (en:Method) |
| NL (1) | NL56358C (en:Method) |
-
0
- NL NL56358D patent/NL56358C/xx active
-
1938
- 1938-12-09 US US244785A patent/US2250769A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2250769A (en) | 1941-07-29 |