NL13557C - - Google Patents
Info
- Publication number
- NL13557C NL13557C NL13557DA NL13557C NL 13557 C NL13557 C NL 13557C NL 13557D A NL13557D A NL 13557DA NL 13557 C NL13557 C NL 13557C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11928316A US1254472A (en) | 1916-09-09 | 1916-09-09 | Signaling-circuit. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL13557C true NL13557C (xx) |
Family
ID=45443198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL13557D NL13557C (xx) | 1916-09-09 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1254472A (xx) |
| DE (2) | DE423810C (xx) |
| FR (3) | FR523350A (xx) |
| GB (2) | GB146880A (xx) |
| NL (1) | NL13557C (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE968963C (de) * | 1947-11-04 | 1958-04-10 | Siemens Ag Albis | Schaltungsanordnung fuer ZB-Fernsprechstationen |
-
0
- NL NL13557D patent/NL13557C/xx active
-
1916
- 1916-09-09 US US11928316A patent/US1254472A/en not_active Expired - Lifetime
-
1920
- 1920-05-28 DE DEB94211D patent/DE423810C/de not_active Expired
- 1920-06-06 DE DEB94457D patent/DE475289C/de not_active Expired
- 1920-06-30 FR FR523350A patent/FR523350A/fr not_active Expired
- 1920-07-06 GB GB18798/20A patent/GB146880A/en not_active Expired
- 1920-07-06 FR FR23230A patent/FR23230E/fr not_active Expired
- 1920-07-06 GB GB18911/20A patent/GB146989A/en not_active Expired
-
1922
- 1922-02-03 FR FR25988D patent/FR25988E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB146880A (en) | 1921-09-01 |
| DE475289C (de) | 1929-04-29 |
| FR23230E (fr) | 1921-10-18 |
| FR523350A (fr) | 1921-08-17 |
| US1254472A (en) | 1918-01-22 |
| FR25988E (fr) | 1923-07-18 |
| DE423810C (de) | 1926-01-18 |
| GB146989A (en) | 1921-09-01 |