FR741139A - - Google Patents
Info
- Publication number
- FR741139A FR741139A FR741139DA FR741139A FR 741139 A FR741139 A FR 741139A FR 741139D A FR741139D A FR 741139DA FR 741139 A FR741139 A FR 741139A
- 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
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR741139A true FR741139A (fr) | 1933-02-04 |
Family
ID=1545715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR741139D Expired FR741139A (fr) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR741139A (fr) |
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0
- FR FR741139D patent/FR741139A/fr not_active Expired