FR632525A - - Google Patents
Info
- Publication number
- FR632525A FR632525A FR632525DA FR632525A FR 632525 A FR632525 A FR 632525A FR 632525D A FR632525D A FR 632525DA FR 632525 A FR632525 A FR 632525A
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
- H04M3/64—Arrangements for signalling the number or class of the calling line to the operator
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR632525A true FR632525A (it) | 1928-01-11 |
Family
ID=1541612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR632525D Expired FR632525A (it) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR632525A (it) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527661A (en) * | 1948-07-10 | 1950-10-31 | Twentieth Cent Fox Film Corp | Electric counter |
| US2998188A (en) * | 1957-02-18 | 1961-08-29 | Mast Dev Company | Universal counter |
-
0
- FR FR632525D patent/FR632525A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527661A (en) * | 1948-07-10 | 1950-10-31 | Twentieth Cent Fox Film Corp | Electric counter |
| US2998188A (en) * | 1957-02-18 | 1961-08-29 | Mast Dev Company | Universal counter |