FR554703A - - Google Patents
Info
- Publication number
- FR554703A FR554703A FR554703DA FR554703A FR 554703 A FR554703 A FR 554703A FR 554703D A FR554703D A FR 554703DA FR 554703 A FR554703 A FR 554703A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
- H04B1/662—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a time/frequency relationship, e.g. time compression or expansion
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP190442X | 1921-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR554703A true FR554703A (xx) | 1923-06-15 |
Family
ID=11988408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR554703D Expired FR554703A (xx) | 1921-12-15 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR554703A (xx) |
| GB (1) | GB190442A (xx) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2434697A (en) * | 1943-09-28 | 1948-01-20 | Charles H Homrighous | Time division multiplex telephone system |
| BE501391A (xx) * | 1950-02-20 | |||
| DE970915C (de) * | 1953-11-15 | 1958-11-13 | Telefonbau & Normalzeit Gmbh | Anordnung zur UEbermittlung von Nachrichten unter Verringerung der Frequenzbandbreite |
| DE1043403B (de) * | 1955-07-23 | 1958-11-13 | Boelkow Entwicklungen Kg | Einrichtung zur Verhinderung des Abhoerens von Nachrichtenuebertragungen durch Unbefugte |
-
0
- FR FR554703D patent/FR554703A/fr not_active Expired
-
1922
- 1922-07-12 GB GB19183/22A patent/GB190442A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB190442A (en) | 1923-10-12 |