BE454425A - - Google Patents
Info
- Publication number
- BE454425A BE454425A BE454425DA BE454425A BE 454425 A BE454425 A BE 454425A BE 454425D A BE454425D A BE 454425DA BE 454425 A BE454425 A BE 454425A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/02—Manually-operated control
- H03G5/04—Manually-operated control in untuned amplifiers
- H03G5/06—Manually-operated control in untuned amplifiers having discharge tubes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL247563X | 1943-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE454425A true BE454425A (forum.php) |
Family
ID=19780914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE454425D BE454425A (forum.php) | 1943-02-18 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE454425A (forum.php) |
| CH (1) | CH247563A (forum.php) |
| FR (1) | FR904080A (forum.php) |
| NL (1) | NL58180C (forum.php) |
-
0
- NL NL58180D patent/NL58180C/xx active
- BE BE454425D patent/BE454425A/xx unknown
-
1944
- 1944-02-17 FR FR904080D patent/FR904080A/fr not_active Expired
- 1944-02-18 CH CH247563D patent/CH247563A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR904080A (fr) | 1945-10-25 |
| CH247563A (de) | 1947-03-15 |
| NL58180C (forum.php) |