NL7210088A - - Google Patents
Info
- Publication number
- NL7210088A NL7210088A NL7210088A NL7210088A NL7210088A NL 7210088 A NL7210088 A NL 7210088A NL 7210088 A NL7210088 A NL 7210088A NL 7210088 A NL7210088 A NL 7210088A NL 7210088 A NL7210088 A NL 7210088A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
- H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
- H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Laminated Bodies (AREA)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7210088A NL7210088A (en) | 1972-07-21 | 1972-07-21 | |
| IN1269/CAL/1973A IN139061B (en) | 1972-07-21 | 1973-05-30 | |
| DE19732333418 DE2333418C2 (en) | 1972-07-21 | 1973-06-30 | Electret foil |
| JP8041273A JPS4946426A (en) | 1972-07-21 | 1973-07-18 | |
| FR7326310A FR2194028B1 (en) | 1972-07-21 | 1973-07-18 | |
| IT6915873A IT991799B (en) | 1972-07-21 | 1973-07-18 | ELECTRICAL FOIL ESPECIALLY FOR ELECTRIC MICROPHONES AND SPEAKERS |
| AT633673A AT326197B (en) | 1972-07-21 | 1973-07-18 | ELECTRIC FOIL |
| GB3417073A GB1394347A (en) | 1972-07-21 | 1973-07-18 | Electret foil |
| JP2759380U JPS55133699U (en) | 1972-07-21 | 1980-03-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7210088A NL7210088A (en) | 1972-07-21 | 1972-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7210088A true NL7210088A (en) | 1974-01-23 |
Family
ID=19816577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7210088A NL7210088A (en) | 1972-07-21 | 1972-07-21 |
Country Status (8)
| Country | Link |
|---|---|
| JP (2) | JPS4946426A (en) |
| AT (1) | AT326197B (en) |
| DE (1) | DE2333418C2 (en) |
| FR (1) | FR2194028B1 (en) |
| GB (1) | GB1394347A (en) |
| IN (1) | IN139061B (en) |
| IT (1) | IT991799B (en) |
| NL (1) | NL7210088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2510279A1 (en) * | 1974-03-15 | 1975-09-18 | Philips Nv | ELECTROSTATIC CONVERTER |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112125A (en) * | 1974-07-19 | 1976-01-30 | Matsushita Electric Ind Co Ltd | EREKUTORETSUTODENKIONKYOHENKANKI |
| SE382297B (en) * | 1974-08-15 | 1976-01-19 | Ericsson Telefon Ab L M | PROCEDURE FOR MANUFACTURING AN ELECTRIC MICROPHONE WITH A CAREFULLY DETERMINED AIR GAP. |
| JPS5430300B1 (en) * | 1975-01-21 | 1979-09-29 | ||
| JPS5814317B2 (en) * | 1976-04-20 | 1983-03-18 | 松下電器産業株式会社 | electrically sensitive recording paper |
| CA1150816A (en) * | 1979-07-06 | 1983-07-26 | Ronald Else | Method and apparatus for implanting a charge in an electret foil |
| FI20070155A0 (en) * | 2007-02-23 | 2007-02-23 | Panphonics Oy | Elektreettilevyrakenne |
| DE102008013942A1 (en) * | 2008-03-12 | 2009-09-17 | Nanogate Ag | Electret coating on a substrate, useful e.g. for finishing textiles and carpets, producing filters, preferably for filtering air and water, and in sensors, comprises non-magnetic particles with inorganic coating and/or magnetic particles |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1789091B2 (en) * | 1967-05-15 | 1974-04-04 | Thermo Electron Corp., Waltham, Mass. (V.St.A.) | Electret and process and apparatus for its manufacture. Eliminated from: 1639444 |
| NL143362B (en) * | 1968-07-10 | 1974-09-16 | Tno | METHOD OF FORMING A ONE-SIDED METALLIZED ELECTRICAL PHOELY, AND SUCH AN ELECTRICAL FOELY FORMED ACCORDING TO THIS METHOD. |
| GB1302590A (en) * | 1969-09-10 | 1973-01-10 | ||
| JPS4857614A (en) * | 1971-11-17 | 1973-08-13 |
-
1972
- 1972-07-21 NL NL7210088A patent/NL7210088A/xx unknown
-
1973
- 1973-05-30 IN IN1269/CAL/1973A patent/IN139061B/en unknown
- 1973-06-30 DE DE19732333418 patent/DE2333418C2/en not_active Expired
- 1973-07-18 JP JP8041273A patent/JPS4946426A/ja active Pending
- 1973-07-18 FR FR7326310A patent/FR2194028B1/fr not_active Expired
- 1973-07-18 GB GB3417073A patent/GB1394347A/en not_active Expired
- 1973-07-18 IT IT6915873A patent/IT991799B/en active
- 1973-07-18 AT AT633673A patent/AT326197B/en not_active IP Right Cessation
-
1980
- 1980-03-03 JP JP2759380U patent/JPS55133699U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2510279A1 (en) * | 1974-03-15 | 1975-09-18 | Philips Nv | ELECTROSTATIC CONVERTER |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2194028A1 (en) | 1974-02-22 |
| ATA633673A (en) | 1975-02-15 |
| IN139061B (en) | 1976-05-01 |
| JPS4946426A (en) | 1974-05-04 |
| DE2333418C2 (en) | 1985-01-10 |
| DE2333418A1 (en) | 1974-01-31 |
| AT326197B (en) | 1975-11-25 |
| JPS55133699U (en) | 1980-09-22 |
| FR2194028B1 (en) | 1977-02-18 |
| IT991799B (en) | 1975-08-30 |
| GB1394347A (en) | 1975-05-14 |