FR741170A - - Google Patents
Info
- Publication number
- FR741170A FR741170A FR741170DA FR741170A FR 741170 A FR741170 A FR 741170A FR 741170D A FR741170D A FR 741170DA FR 741170 A FR741170 A FR 741170A
- 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
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR741170A true FR741170A (xx) | 1933-02-08 |
Family
ID=1545744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR741170D Expired FR741170A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR741170A (xx) |
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0
- FR FR741170D patent/FR741170A/fr not_active Expired