FR33772E - - Google Patents
Info
- Publication number
- FR33772E FR33772E FR33772DA FR33772E FR 33772 E FR33772 E FR 33772E FR 33772D A FR33772D A FR 33772DA FR 33772 E FR33772 E FR 33772E
- 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
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR608242T | 1925-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR33772E true FR33772E (en:Method) | 1929-03-01 |
Family
ID=8975935
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR33772D Expired FR33772E (en:Method) | 1925-11-27 | ||
| FR608242D Expired FR608242A (fr) | 1925-11-27 | 1925-11-27 | Perfectionnements aux systèmes téléphoniques |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR608242D Expired FR608242A (fr) | 1925-11-27 | 1925-11-27 | Perfectionnements aux systèmes téléphoniques |
Country Status (2)
| Country | Link |
|---|---|
| FR (2) | FR608242A (en:Method) |
| NL (1) | NL18632C (en:Method) |
-
0
- NL NL18632D patent/NL18632C/xx active
- FR FR33772D patent/FR33772E/fr not_active Expired
-
1925
- 1925-11-27 FR FR608242D patent/FR608242A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL18632C (en:Method) | |
| FR608242A (fr) | 1926-07-23 |