NL225484A - - Google Patents
Info
- Publication number
- NL225484A NL225484A NL225484DA NL225484A NL 225484 A NL225484 A NL 225484A NL 225484D A NL225484D A NL 225484DA NL 225484 A NL225484 A NL 225484A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/48—Coupling means therefor
- H03H9/50—Mechanical coupling means
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1957T0013399 DE1242770B (de) | 1957-03-22 | 1957-03-22 | Mechanisches Frequenzfilter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL225484A true NL225484A (pt) |
Family
ID=7547323
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL114040D NL114040C (pt) | 1957-03-22 | ||
| NL225484D NL225484A (pt) | 1957-03-22 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL114040D NL114040C (pt) | 1957-03-22 |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH358873A (pt) |
| DE (1) | DE1242770B (pt) |
| FR (1) | FR1191702A (pt) |
| NL (2) | NL225484A (pt) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1491528B1 (de) * | 1965-04-20 | 1972-04-27 | Elektronische Bauelemente Veb | Mechanischer bandpass |
| DE2124787C2 (de) * | 1971-05-19 | 1984-07-12 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Mechanische Filter |
| FR2360212A1 (fr) * | 1976-07-26 | 1978-02-24 | Lignes Telegraph Telephon | Perfectionnement au couplage pour filtres electromecaniques |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2240306A (en) * | 1939-10-24 | 1941-04-29 | Bell Telephone Labor Inc | Electromechanical filter |
| NL71852C (pt) * | 1946-01-07 | |||
| NL162357B (nl) * | 1951-07-02 | Basf Ag | Werkwijze voor de bereiding van aldehyden en alcoholen volgens het oxo-procede. | |
| GB703020A (en) * | 1951-07-18 | 1954-01-27 | John Hugh Davey Walton | Improvements in or relating to frequency filters |
-
0
- NL NL114040D patent/NL114040C/xx active
- NL NL225484D patent/NL225484A/xx unknown
-
1957
- 1957-03-22 DE DE1957T0013399 patent/DE1242770B/de active Pending
-
1958
- 1958-02-12 CH CH358873D patent/CH358873A/de unknown
- 1958-02-19 FR FR1191702D patent/FR1191702A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1191702A (fr) | 1959-10-21 |
| NL114040C (pt) | |
| CH358873A (de) | 1961-12-15 |
| DE1242770B (de) | 1967-06-22 |