NL220430A - - Google Patents
Info
- Publication number
- NL220430A NL220430A NL220430DA NL220430A NL 220430 A NL220430 A NL 220430A NL 220430D A NL220430D A NL 220430DA NL 220430 A NL220430 A NL 220430A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Radio Relay Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US626846A US2892037A (en) | 1956-12-07 | 1956-12-07 | Electrical information system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL220430A true NL220430A (US07223432-20070529-C00017.png) |
Family
ID=24512104
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL112427D NL112427C (US07223432-20070529-C00017.png) | 1956-12-07 | ||
| NL220430D NL220430A (US07223432-20070529-C00017.png) | 1956-12-07 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL112427D NL112427C (US07223432-20070529-C00017.png) | 1956-12-07 |
Country Status (6)
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3061817A (en) * | 1959-04-22 | 1962-10-30 | Gen Dynamics Corp | Finder circuit |
| US3028510A (en) * | 1959-12-21 | 1962-04-03 | Automatic Elect Lab | Diode gate utilizing charged capacitor to forward bias diode |
| DE1162418B (de) * | 1960-11-22 | 1964-02-06 | Standard Elektrik Lorenz Ag | Schaltungsanordnung zur Verhinderung der faelschlichen Auswertung von UEberspannungen durch Signalempfaenger in Fernmeldeanlagen |
| US3129291A (en) * | 1960-12-29 | 1964-04-14 | Bell Telephone Labor Inc | Remote distributed telephone line concentrator |
| BE632293A (US07223432-20070529-C00017.png) * | 1961-03-03 | |||
| DE1157665B (de) * | 1962-04-04 | 1963-11-21 | Telefunken Patent | Schaltungsanordnung zur Pruefung des Belegungszustandes von Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechanlagen |
| US3393276A (en) * | 1964-10-14 | 1968-07-16 | Ericsson Telefon Ab L M | Threshold crosspoint identifying means for an automatic telephone exchange |
| DE1260552B (de) * | 1965-02-15 | 1968-02-08 | Telefonbau | Relaislose Teilnehmeranschlussschaltung fuer Fernsprechanlagen |
| BE754235A (fr) * | 1969-08-05 | 1970-12-31 | Western Electric Co | Circuit de supervision pour lignes telephoniques |
| ZA74205B (en) * | 1973-02-12 | 1974-11-27 | Int Standard Electric Corp | Line condition signalling system |
| US4150258A (en) * | 1975-02-03 | 1979-04-17 | Oki Electric Industry Co., Ltd. | Electronic switching system |
| US4292473A (en) * | 1979-08-06 | 1981-09-29 | International Standard Electric Corporation | Loop supervision circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL89659C (US07223432-20070529-C00017.png) * | 1952-01-26 | |||
| US2715656A (en) * | 1952-08-02 | 1955-08-16 | Bell Telephone Labor Inc | Electrical information system |
| US2724744A (en) * | 1954-05-06 | 1955-11-22 | Bell Telephone Labor Inc | Remote line concentrator |
| US2783307A (en) * | 1954-05-06 | 1957-02-26 | Bell Telephone Labor Inc | Supervisory circuit |
-
0
- NL NL112427D patent/NL112427C/xx active
- NL NL220430D patent/NL220430A/xx unknown
- BE BE560633D patent/BE560633A/xx unknown
- DE DENDAT1073552D patent/DE1073552B/de active Pending
-
1956
- 1956-12-07 US US626846A patent/US2892037A/en not_active Expired - Lifetime
-
1957
- 1957-10-18 FR FR1184842D patent/FR1184842A/fr not_active Expired
- 1957-11-29 GB GB37340/57A patent/GB843225A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2892037A (en) | 1959-06-23 |
| NL112427C (US07223432-20070529-C00017.png) | |
| BE560633A (US07223432-20070529-C00017.png) | |
| FR1184842A (fr) | 1959-07-27 |
| DE1073552B (de) | 1960-01-21 |
| GB843225A (en) | 1960-08-04 |
