FI65695C - Hoegtalarmembran - Google Patents
Hoegtalarmembran Download PDFInfo
- Publication number
- FI65695C FI65695C FI770850A FI770850A FI65695C FI 65695 C FI65695 C FI 65695C FI 770850 A FI770850 A FI 770850A FI 770850 A FI770850 A FI 770850A FI 65695 C FI65695 C FI 65695C
- Authority
- FI
- Finland
- Prior art keywords
- membrane according
- polypropylene
- polyethylene
- membrane
- ethylene
- Prior art date
Links
- -1 polypropylene Polymers 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 30
- 239000012528 membrane Substances 0.000 claims description 22
- 229920001155 polypropylene Polymers 0.000 claims description 19
- 239000004743 Polypropylene Substances 0.000 claims description 18
- 229920003023 plastic Polymers 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229920001684 low density polyethylene Polymers 0.000 claims description 3
- 239000004702 low-density polyethylene Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052790 beryllium Inorganic materials 0.000 claims description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000013016 damping Methods 0.000 claims description 2
- 229920001179 medium density polyethylene Polymers 0.000 claims description 2
- 239000004701 medium-density polyethylene Substances 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 229920000098 polyolefin Polymers 0.000 claims 1
- 230000000704 physical effect Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000005520 electrodynamics Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical group [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920006350 polyacrylonitrile resin Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/029—Diaphragms comprising fibres
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Laminated Bodies (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11057/76A GB1563511A (en) | 1976-03-19 | 1976-03-19 | Diaphragms for electroacoustic transducers |
| GB1105776 | 1976-03-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI770850A7 FI770850A7 (da) | 1977-09-20 |
| FI65695B FI65695B (fi) | 1984-02-29 |
| FI65695C true FI65695C (fi) | 1984-06-11 |
Family
ID=9979221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI770850A FI65695C (fi) | 1976-03-19 | 1977-03-17 | Hoegtalarmembran |
Country Status (21)
| Country | Link |
|---|---|
| US (1) | US4190746A (da) |
| AR (1) | AR212199A1 (da) |
| AU (1) | AU510556B2 (da) |
| BE (2) | BE852615A (da) |
| BR (1) | BR7701698A (da) |
| CA (1) | CA1058090A (da) |
| CH (1) | CH637258A5 (da) |
| DE (1) | DE2711996C2 (da) |
| DK (1) | DK148579C (da) |
| ES (1) | ES457329A1 (da) |
| FI (1) | FI65695C (da) |
| FR (1) | FR2345048A1 (da) |
| GB (1) | GB1563511A (da) |
| HK (1) | HK62684A (da) |
| IT (1) | IT1085790B (da) |
| NL (1) | NL7702930A (da) |
| NO (1) | NO148055C (da) |
| NZ (1) | NZ183607A (da) |
| SE (1) | SE7703123L (da) |
| SG (1) | SG17883G (da) |
| ZA (1) | ZA771543B (da) |
Families Citing this family (68)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2801137A1 (de) * | 1978-01-12 | 1979-07-19 | Peerless Gmbh | Lautsprecher |
| JPS5527721A (en) * | 1978-08-18 | 1980-02-28 | Sony Corp | Diaphragm for electroacoustic converter |
| DE2900427B1 (de) * | 1979-01-08 | 1979-08-02 | Licentia Gmbh | Dynamischer Wandler mit einer Schwingspule in einem mit einer magnetischen Fluessigkeit gefuellten Luftspalt |
| JPS55173691U (da) * | 1979-05-31 | 1980-12-12 | ||
| JPS5634297A (en) * | 1979-08-29 | 1981-04-06 | Kenzo Inoue | Speaker unit |
| GB2059717B (en) * | 1979-09-25 | 1984-04-04 | Victor Company Of Japan | Speaker diaphragm assembly and a method of manufacturing the same |
| GB2062408B (en) * | 1979-10-02 | 1984-02-22 | Victor Company Of Japan | Speaker |
| DE3070816D1 (en) * | 1979-11-09 | 1985-08-01 | Matsushita Electric Industrial Co Ltd | Loud-speaker |
| FR2471113A1 (fr) * | 1979-12-05 | 1981-06-12 | Audax | Membrane notamment pour transducteur electro-acoustique |
| GB2070390B (en) | 1980-02-21 | 1985-08-07 | Rank Organisation Ltd | Loudspeaker diaphragm |
| US4319098A (en) * | 1980-04-30 | 1982-03-09 | Motorola, Inc. | Loudspeaker having a unitary mechanical-acoustic diaphragm termination |
| DE3265340D1 (en) | 1981-03-20 | 1985-09-19 | Kuraray Co | Diaphragm for an electro-acoustic transducer |
| JPS58111600A (ja) * | 1981-12-25 | 1983-07-02 | Victor Co Of Japan Ltd | 音響振動板 |
| FR2522912B1 (fr) * | 1982-03-03 | 1986-08-14 | Audax | Suspension peripherique en elastomere de la membrane d'un transducteur electro-acoustique |
| US4518642A (en) * | 1983-04-15 | 1985-05-21 | International Jensen Incorporated | Loudspeaker diaphragm and method for making same |
| NL8301653A (nl) * | 1983-05-10 | 1984-12-03 | Philips Nv | Elektro-akoestische omzetter met een luchtdoorlatend membraan. |
| US4552243A (en) * | 1984-05-03 | 1985-11-12 | Pioneer Industrial Components, Inc. | Diaphragm material for acoustical transducer |
| GB8514189D0 (en) * | 1985-06-05 | 1985-07-10 | Reefgrade Ltd | Electro-mechanical transducer diaphragm |
| DE3603537A1 (de) * | 1986-02-05 | 1987-08-06 | Pfleid Wohnraumakustik Gmbh | Breitbandlautsprecher |
| GB8603645D0 (en) * | 1986-02-14 | 1986-03-19 | Celestion Int Ltd | Loudspeakers |
| DE3719879A1 (de) * | 1987-06-13 | 1988-12-29 | Bayer Ag | Mehrschichtfolien fuer lautsprechermembransysteme |
| DE3862617D1 (de) * | 1987-07-03 | 1991-06-06 | Electronic Werke Deutschland | Membran fuer einen lautsprecher. |
| US5008945A (en) * | 1988-05-23 | 1991-04-16 | Pioneer Electronic Corp. | Water-proof speaker unit |
| DE3831706A1 (de) * | 1988-09-17 | 1990-03-22 | Bayer Ag | Membran fuer lautsprecher |
| JPH04500890A (ja) * | 1988-10-03 | 1992-02-13 | ハーマン インターナショナル インダストリーズ，インコーポレイテッド | 動電変換器の構造 |
| JPH02260799A (ja) * | 1989-03-30 | 1990-10-23 | Pioneer Electron Corp | スピーカおよびその製造方法 |
| JP3116119B2 (ja) * | 1989-04-27 | 2000-12-11 | ティーオーエー株式会社 | スピーカ用ホーン |
| JPH07101959B2 (ja) * | 1990-06-29 | 1995-11-01 | オンキヨー株式会社 | スピーカ用振動板の接着方法 |
| DE4116819A1 (de) * | 1991-05-23 | 1992-11-26 | Nokia Deutschland Gmbh | Staubschutzkalotte fuer konuslautsprecher |
| US5689573A (en) * | 1992-01-07 | 1997-11-18 | Boston Acoustics, Inc. | Frequency-dependent amplitude modification devices for acoustic sources |
| ATE132681T1 (de) | 1992-01-15 | 1996-01-15 | Patrick Arthur Leach | Verfahren und vorrichtung zur herstellung eines lautsprecherkonus und einer sickenanordnung |
| CH684670A5 (de) * | 1992-10-20 | 1994-11-15 | Gyoergy Csikos | Verfahren zum Wandeln der mechanischen Schwingung eines Treibers in ein akustisches Signal und Wandler zu dessen Ausführung. |
| US5701358A (en) * | 1994-07-05 | 1997-12-23 | Larsen; John T. | Isobaric loudspeaker |
| US5687247A (en) * | 1995-07-13 | 1997-11-11 | Proni; Lucio | Surround for a loudspeaker |
| GB2315185A (en) | 1996-07-09 | 1998-01-21 | B & W Loudspeakers | Diaphragm surrounds for loudspeaker drive units |
| EP0966862B1 (de) * | 1997-03-12 | 2002-07-03 | Siegfried Schriever | Lautsprecher und verfahren zur herstellung eines lautsprechers |
| US5848174A (en) * | 1998-02-09 | 1998-12-08 | Ki; Young Do | Linear movement speaker system |
| PL191378B1 (pl) | 1998-06-22 | 2006-05-31 | Slab Technology Ltd | Głośnik |
| CN1275300A (zh) * | 1998-07-21 | 2000-11-29 | Jbl公司 | 微型全频程扩音器 |
| US6173065B1 (en) * | 1999-08-03 | 2001-01-09 | Steff Lin | Structure of speaker |
| EP1100287A1 (en) * | 1999-11-10 | 2001-05-16 | M- Tech(HK) Co. Ltd | Loudspeaker |
| FR2808161A1 (fr) * | 2000-04-19 | 2001-10-26 | Ecia Equip Composants Ind Auto | Haut-parleur et ligne d'echappement le comportant |
| JP2002300696A (ja) * | 2001-03-30 | 2002-10-11 | Pioneer Electronic Corp | スピーカ用ダンパ |
| GB2377849A (en) * | 2001-07-21 | 2003-01-22 | Kh Technology Corp | Loudspeaker drive units with smooth transition to surround |
| US6940007B2 (en) * | 2002-02-20 | 2005-09-06 | James Schmidt | Pad with improved sound-reflecting surface for woodwind musical instruments and lubricant to prevent pads from sticking |
| FR2854021B1 (fr) * | 2003-04-16 | 2006-03-31 | Focal Jmlab | Transducteur acoustiques en beryllium pur a radiation directe, a membrane de forme concave, pour applications audio notamment pour enceintes acoustiques |
| DE10321690A1 (de) * | 2003-05-14 | 2004-12-09 | Harman Becker Automotive Systems Gmbh | Lautsprecher |
| KR100533715B1 (ko) * | 2003-12-05 | 2005-12-05 | 신정열 | 코일판 가이드수단을 구비하는 평판형 스피커 |
| EP1558057A1 (en) * | 2004-01-23 | 2005-07-27 | DE ROOIJ, Jacobus, Maria | Loudspeaker with specific plastic element for sound emission |
| US20060050924A1 (en) * | 2004-09-03 | 2006-03-09 | Hiroshi Ohara | Angled cone of loudspeaker |
| US7945069B2 (en) * | 2004-11-22 | 2011-05-17 | Harman International Industries, Incorporated | Loudspeaker plastic cone body |
| CN101138271A (zh) * | 2005-01-06 | 2008-03-05 | Pss比利时股份有限公司 | 具有可移动的锥形主体的扬声器 |
| JP4059265B2 (ja) * | 2005-06-08 | 2008-03-12 | オンキヨー株式会社 | スピーカー用部材およびその製造方法 |
| DE102008018206B3 (de) * | 2008-04-10 | 2009-10-22 | Johanna Reck | Lautsprecher |
| US20100236861A1 (en) * | 2009-03-17 | 2010-09-23 | Merry Electronics Co., Ltd. | Diaphragm of electro-acoustic transducer |
| HU229608B1 (en) * | 2011-10-04 | 2014-03-28 | Zoltan Bay | Loudspeaker |
| GB2505953B (en) * | 2012-09-18 | 2019-05-08 | B & W Group Ltd | Stepped thickness change in dome-shaped diaphragms for loudspeaker drive units or microphones |
| US9232314B2 (en) * | 2013-09-09 | 2016-01-05 | Sonos, Inc. | Loudspeaker configuration |
| FR3014628B1 (fr) * | 2013-12-05 | 2017-04-21 | Devialet | Haut-parleur electrodynamique compact a membrane convexe |
| US9008348B1 (en) | 2014-01-03 | 2015-04-14 | Rockford Corporation | Low profile loudspeaker |
| US9025809B1 (en) | 2014-01-03 | 2015-05-05 | Rockford Corporation | Voicecoil affixation |
| TWI561093B (en) * | 2014-10-29 | 2016-12-01 | Asustek Comp Inc | Speaker structure |
| US9769570B2 (en) * | 2015-03-31 | 2017-09-19 | Bose Corporation | Acoustic diaphragm |
| US9854365B2 (en) | 2016-04-15 | 2017-12-26 | Harman International Industries, Inc. | Loudspeaker motor and suspension system |
| CN206341125U (zh) * | 2016-12-12 | 2017-07-18 | 瑞声科技(新加坡)有限公司 | 振动电机 |
| US20190253790A1 (en) | 2018-02-15 | 2019-08-15 | Alexander B Ralph | Ported tweeter |
| US11381921B2 (en) * | 2018-10-30 | 2022-07-05 | Sound Solutions International Co., Ltd. | Electrodynamic acoustic transducer with improved suspension system |
| DE102020001252A1 (de) | 2020-02-26 | 2021-08-26 | Christian Alexander Groneberg | Lautsprechermembran und Verfahren zur Herstellung einer Lautsprechermembran für einen Lautsprecher des Typs Bändchenmagnetostat |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR558037A (fr) * | 1922-02-17 | 1923-08-20 | Ets Gaumont Soc | Appareil pour la production des sons, tel que récepteur ou émetteur téléphoniqueélectro-magnétique |
| US2922851A (en) * | 1957-05-10 | 1960-01-26 | Gen Dynamics Corp | Loudspeakers |
| US3111187A (en) * | 1959-11-23 | 1963-11-19 | H J Leak & Company Ltd | Diaphragm for electro acoustic transducer |
| US3093207A (en) * | 1960-10-04 | 1963-06-11 | R T Bozak Mfg Company | Metallic diaphragm for electrodynamic loudspeakers |
| US3313018A (en) * | 1962-07-06 | 1967-04-11 | Tibbetts Industries | Method of making diaphragm means for acoustic translating devices |
| US3345469A (en) * | 1964-03-02 | 1967-10-03 | Rod Dev Corp | Electrostatic loudspeakers |
| DE1299041B (de) * | 1966-04-06 | 1969-07-10 | Nippon Gakki Co Ltd Seizo Kabu | Membran fuer Flachlautsprecher |
| GB1174911A (en) * | 1966-06-20 | 1969-12-17 | Audio & Design Ltd | Improvements in or relating to Electro-Acoustic Transducers |
| GB1271539A (en) * | 1969-10-22 | 1972-04-19 | Foster Electric Co Ltd | Diaphragm for loud speakers and method of making the same |
| DE2225710C3 (de) * | 1971-05-28 | 1975-12-04 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | Membran für elektroakustische Wandler und Verfahren zu ihrer Herstellung |
| DE2233225C3 (de) * | 1971-07-07 | 1975-03-27 | Pioneer Electronic Corp., Tokio | Lautsprecher für einen Kopfhörer oder dgl |
| AT310272B (de) * | 1971-12-09 | 1973-09-25 | Akg Akustische Kino Geraete | Elektrodynamisches Antriebsystem, insbesondere Schallwandler |
| JPS5346087B2 (da) * | 1973-07-19 | 1978-12-11 | ||
| US3930130A (en) * | 1973-09-21 | 1975-12-30 | Union Carbide Corp | Carbon fiber strengthened speaker cone |
| US3898598A (en) * | 1974-01-24 | 1975-08-05 | Foster Tsushin Kogyo | Dynamic electroacoustic transducer |
| US3935397A (en) * | 1974-01-28 | 1976-01-27 | Electronic Industries, Inc. | Electrostatic loudspeaker element |
| US4020296A (en) * | 1976-01-19 | 1977-04-26 | Dahlquist Jon G | Electroacoustic transducer |
-
1976
- 1976-03-19 GB GB11057/76A patent/GB1563511A/en not_active Expired
-
1977
- 1977-03-15 NZ NZ183607A patent/NZ183607A/xx unknown
- 1977-03-15 ZA ZA00771543A patent/ZA771543B/xx unknown
- 1977-03-15 NO NO770927A patent/NO148055C/no unknown
- 1977-03-17 NL NL7702930A patent/NL7702930A/xx not_active Application Discontinuation
- 1977-03-17 FI FI770850A patent/FI65695C/fi not_active IP Right Cessation
- 1977-03-18 CA CA274,277A patent/CA1058090A/en not_active Expired
- 1977-03-18 US US05/779,221 patent/US4190746A/en not_active Expired - Lifetime
- 1977-03-18 ES ES457329A patent/ES457329A1/es not_active Expired
- 1977-03-18 BR BR7701698A patent/BR7701698A/pt unknown
- 1977-03-18 BE BE175897A patent/BE852615A/xx unknown
- 1977-03-18 CH CH342677A patent/CH637258A5/de not_active IP Right Cessation
- 1977-03-18 SE SE7703123A patent/SE7703123L/xx unknown
- 1977-03-18 AR AR266907A patent/AR212199A1/es active
- 1977-03-18 DE DE2711996A patent/DE2711996C2/de not_active Expired
- 1977-03-18 DK DK120877A patent/DK148579C/da active
- 1977-03-21 AU AU23434/77A patent/AU510556B2/en not_active Expired
- 1977-03-21 FR FR7708367A patent/FR2345048A1/fr active Granted
- 1977-03-21 IT IT21446/77A patent/IT1085790B/it active
-
1980
- 1980-02-01 BE BE0/199221A patent/BE881498Q/fr not_active IP Right Cessation
-
1983
- 1983-04-14 SG SG178/83A patent/SG17883G/en unknown
-
1984
- 1984-08-09 HK HK626/84A patent/HK62684A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE852615A (fr) | 1977-07-18 |
| NL7702930A (nl) | 1977-09-21 |
| CA1058090A (en) | 1979-07-10 |
| BE881498Q (fr) | 1980-05-30 |
| FI65695B (fi) | 1984-02-29 |
| FR2345048B1 (da) | 1985-05-17 |
| AU510556B2 (en) | 1980-07-03 |
| ZA771543B (en) | 1978-03-29 |
| CH637258A5 (de) | 1983-07-15 |
| AR212199A1 (es) | 1978-05-31 |
| ES457329A1 (es) | 1978-02-16 |
| BR7701698A (pt) | 1978-01-24 |
| NZ183607A (en) | 1981-04-24 |
| DK148579B (da) | 1985-08-05 |
| IT1085790B (it) | 1985-05-28 |
| NO148055B (no) | 1983-04-18 |
| NO770927L (no) | 1977-09-20 |
| GB1563511A (en) | 1980-03-26 |
| DK120877A (da) | 1977-09-20 |
| AU2343477A (en) | 1978-09-28 |
| US4190746A (en) | 1980-02-26 |
| SE7703123L (sv) | 1977-09-20 |
| HK62684A (en) | 1984-08-17 |
| FI770850A7 (da) | 1977-09-20 |
| NO148055C (no) | 1983-08-10 |
| DK148579C (da) | 1985-12-30 |
| DE2711996A1 (de) | 1977-09-29 |
| FR2345048A1 (fr) | 1977-10-14 |
| DE2711996C2 (de) | 1985-01-31 |
| SG17883G (en) | 1985-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed |
Owner name: STEBBINGS, DAVID WILLIAM Owner name: PAO, JOSEPH YEE CHING |