BE731937A - - Google Patents
Info
- Publication number
- BE731937A BE731937A BE731937DA BE731937A BE 731937 A BE731937 A BE 731937A BE 731937D A BE731937D A BE 731937DA BE 731937 A BE731937 A BE 731937A
- Authority
- BE
- Belgium
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
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/56—Monolithic crystal filters
- H03H9/566—Electric coupling means therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Electrotherapy Devices (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72367668A | 1968-04-24 | 1968-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE731937A true BE731937A (de) | 1969-10-01 |
Family
ID=24907217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE731937D BE731937A (de) | 1968-04-24 | 1969-04-23 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3576506A (de) |
| BE (1) | BE731937A (de) |
| CH (1) | CH493966A (de) |
| ES (1) | ES366624A1 (de) |
| FR (1) | FR2006869A1 (de) |
| GB (1) | GB1268542A (de) |
| NL (1) | NL156284B (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1932911B2 (de) * | 1969-06-28 | 1972-02-17 | Licentia Patent-Verwaltungs-GmbH, 6000*Frankfurt | Piezoelektrische resonatoranordnung in monolithischer aus fuehrung |
| US3697788A (en) * | 1970-09-30 | 1972-10-10 | Motorola Inc | Piezoelectric resonating device |
| US3676805A (en) * | 1970-10-12 | 1972-07-11 | Bell Telephone Labor Inc | Monolithic crystal filter with auxiliary filter shorting tabs |
| JPS5329265B2 (de) * | 1972-09-20 | 1978-08-19 | ||
| JPS49131050A (de) * | 1973-04-17 | 1974-12-16 | ||
| US3947784A (en) * | 1974-09-19 | 1976-03-30 | Motorola, Inc. | Dual-coupled monolithic crystal element for modifying response of filter |
| US4329666A (en) * | 1980-08-11 | 1982-05-11 | Motorola, Inc. | Two-pole monolithic crystal filter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3396327A (en) * | 1961-12-27 | 1968-08-06 | Toyotsushinki Kabushiki Kaisha | Thickness shear vibration type, crystal electromechanical filter |
| US3222622A (en) * | 1962-08-14 | 1965-12-07 | Clevite Corp | Wave filter comprising piezoelectric wafer electroded to define a plurality of resonant regions independently operable without significant electro-mechanical interaction |
| US3363119A (en) * | 1965-04-19 | 1968-01-09 | Clevite Corp | Piezoelectric resonator and method of making same |
| US3384768A (en) * | 1967-09-29 | 1968-05-21 | Clevite Corp | Piezoelectric resonator |
-
1968
- 1968-04-24 US US723676A patent/US3576506A/en not_active Expired - Lifetime
-
1969
- 1969-04-23 BE BE731937D patent/BE731937A/xx not_active IP Right Cessation
- 1969-04-23 CH CH615469A patent/CH493966A/de not_active IP Right Cessation
- 1969-04-23 NL NL6906267.A patent/NL156284B/xx not_active IP Right Cessation
- 1969-04-23 GB GB20679/69A patent/GB1268542A/en not_active Expired
- 1969-04-23 ES ES366624A patent/ES366624A1/es not_active Expired
- 1969-04-24 FR FR6913109A patent/FR2006869A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1920078B2 (de) | 1973-02-01 |
| FR2006869A1 (de) | 1970-01-02 |
| NL156284B (nl) | 1978-03-15 |
| DE1920078A1 (de) | 1969-10-30 |
| ES366624A1 (es) | 1971-03-16 |
| GB1268542A (en) | 1972-03-29 |
| NL6906267A (de) | 1969-10-28 |
| US3576506A (en) | 1971-04-27 |
| CH493966A (de) | 1970-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: WESTERN ELECTRIC CY INC. Effective date: 19850423 |