EP1458215A2 - Surroundless piston-driven vibrating speaker - Google Patents

Surroundless piston-driven vibrating speaker Download PDF

Info

Publication number
EP1458215A2
EP1458215A2 EP04003091A EP04003091A EP1458215A2 EP 1458215 A2 EP1458215 A2 EP 1458215A2 EP 04003091 A EP04003091 A EP 04003091A EP 04003091 A EP04003091 A EP 04003091A EP 1458215 A2 EP1458215 A2 EP 1458215A2
Authority
EP
European Patent Office
Prior art keywords
damper
forementioned
surroundless
piston
voice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04003091A
Other languages
German (de)
French (fr)
Other versions
EP1458215A3 (en
Inventor
Lian Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1458215A2 publication Critical patent/EP1458215A2/en
Publication of EP1458215A3 publication Critical patent/EP1458215A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/34—Directing or guiding sound by means of a phase plug
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the present invention relates to a vibrating speaker in the technical field of electromagnetism and particularly to a surroundless piston-driven vibrating speaker.
  • the surroundless piston-driven vibrating speaker comprises an improved vibrating system, a supporting system, and an external magnet system, wherein the improved vibrating system comprises a voice cone 12 in the shape of "7", a voice coil 4, a central damper 5, wherein the supporting system comprises a shell frame 1 with air vents 10, a floating locating damper 6, a sound absorption cotton material 8, a damper fixing ring and a dust preventing cover 13.
  • the forementioned surroundless piston-driven vibrating speaker wherein the voice coil 4 is a cylindrical voice coil or flat voice coil with a frame, or a no bobbin voice coil without a frame, attached at the top of the inner circle of the cone.
  • the forementioned surroundless piston-driven vibrating speaker wherein the shell frame 1 has one or more air vents 10.
  • the forementioned surroundless piston-driven vibrating speaker wherein the floating locating damper 6 is a wave like plate in the shape of round circle, the outer side of which is attached at the back of the edge of the voice cone12, while the inner side is attached at the upper side of the outer side of the shell 1.
  • the forementioned surroundless piston-driven vibrating speaker wherein the sound absorption cotton material 8 is attached in the empty space between the voice cone12 and the shell 1.
  • the forementioned surroundless piston-driven vibrating speaker wherein the damper fixing ring comprises an upper locating ring 11 and a lower locating ring 9. They have the same inner diameter which is bigger than that of the central damper 5. Their outer diameter is same as that of damper 5.
  • the lower locating ring 9 is attached above the magnet chip 2; the central damper 5 is attached above the lower locating ring 9; the upper locating ring 11 is attached above the central damper 5.
  • the present invention is apparently different from the conventional technical solutions. It employs a voice cone and a voice coil in the vibrating system, a locating damper in the supporting system and a central damper to compose there points (in one) coaxial resonance, and uses multi-level supporting and fixing to ensure that the vibration of speaker generate linear piston movement.
  • the present invention employs surroundless design in the vibrating system, so that it totally gets rid of the constrain of the surround in conventional speakers. It forms coaxial three-points locating linkage sound and directs the whole vibrating system to generate linear sounding movement by connecting the floating locating damper supported from the bottom, the central damper and the voice cone. In the whole voice conformity mechanism, besides the function of locating, the floating locating damper also functions as a second vibration facilitator. It gives the speaker better compliance, and greatly decreases the general damp coefficient. Different from the edge of surround in conventional speaker, which doesn't vibrate when sounding, the special designed voice cone ensures the vibrating sounding of the whole cone and improves the sensitivity and the voice consistency of the whole apparatus.
  • the present invention forms independent mediant voice box after all components installed. There is no need to design the voice box separately. This makes the installation and design flexible and convenient.
  • the air flow inside the speaker is buffered, thus disperses the standing wave and bad back reflect caused by the air flow on the back of the speaker, improves the frequency property of sound absorption cotton to get better frequency curve, and makes the speaker work independently without any additional outer condition; also, smooth frequency curve and box effect of big volume sound box can be obtained, which makes the shortcomings of conventional sealed sound box and small volume sound box, such as high Q value, dry sound and unsmooth frequency curve.
  • the surroundless piston-driven vibrating speaker according to the present invention provides, in the field with the limited technical developing space, significant improvement both in structure and function. It makes sufficient technical improvement and is feasible and easy to use, thus it has indeed improved function that makes it practical to use. It is a novel and improved practical design.
  • the surroundless piston-driven vibrating speaker and its implementation, structure, attributes and functions, is the illustrated in detail as follows.
  • a surroundless piston-driven vibrating speaker of the present invention including: a shell and a vibrating voice generating part.
  • the vibrating voice generating part mainly comprises an improved vibrating system, a supporting system and an external magnet system.
  • the shell frame 1 is made of metal like copper or aluminum, or plastic, with air vents 10 at the side.
  • the number of the forementioned air vents 10 should be between 1 and 10. It is 6 in this embodiment.
  • External magnet system is composed of a ferrite core 2, an upper plate 3 and a T-yoke 7.
  • the forementioned ferrite core 2 is evenly installed between the upper plate3 and the T-yoke 7.
  • the forementioned T-yoke 7 is installed in the loop part of the voice coil 4.
  • Voice cone' which is in the shape of "7" is attached in a way that its inner side of the outer edge is connected with the outer side of the floating locating damper 6, and its outer side of the inner edge is connected with the upper side of the frame of the voice coil 4.
  • the inner side of the floating locating damper 6 is attached to the outer side of the upper end of the shell framel; the frame of the voice coil4 is around the central pole of the T-yoke.
  • the lower locating ring of damper 9 and the upper locating ring of damper 11 are made of metal like copper or aluminum, or plastic.
  • the forementioned locating ring 9 and 11 has the same inner diameter, and their outer diameter is same as that of damper.
  • the lower locating ring 9 is attached above the ferrite core 2; the damper 5 is attached above the lower locating ring9; the upper locating ring 11 is attached above the damper 5.
  • the upper' lower locating ring are installed clipping the outer edge of the central damper 5 at both the upper and the lower end.
  • the damper 5 is a rippled laminate in circle shape which is made of foam, rubber, cotton adhesive plaster' silk adhesive plaster, or compound adhesive plaster with carbon fibre or fiberglass.
  • the sound absorption cotton material 8 is made of plastic foam or foamed resin. It is used to fill in the space between the voice cone 12, the shell 1, the ferrite core 2 and the locating ring.
  • the forementioned dust preventing cover is normal dust preventing cover for speaker. It is installed on the voice cone 12, covering the voice coil 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

Disclosed is a surroundless piston-driven vibrating speaker, the main structure of which is composed of an improved vibrating system, a supporting system and an external magnet system. The forementioned vibrating system comprises a voice cone, a voice coil and a central damper. The forementioned supporting system comprises a shell frame 1 with air holes, a floating locating damper6, a sound absorption cotton material 8, a damper fixing ring and a dust preventing cover 13. The forementioned external magnet system comprises a ferrite core, an upper plate and a T-yoke.

Description

Field of the invention
The present invention relates to a vibrating speaker in the technical field of electromagnetism and particularly to a surroundless piston-driven vibrating speaker.
Background of the invention
Currently, no technical document files or reports similar technical solution and there are not any products in the market or used in other products; the present technology most similar to the invention is "long stroke speaker", the patent no. of which is 00117592.0. This technology abandons the so called surround in speaker supporting system, and adopts "cone frame" at the middle part of "cone" . The vibrating system adopts double "voice coil" structure. Its magnetic circuits system uses two magnetically controlled switches to control magnet function effects.
Summary of the invention
It is the principle object of the present invention to provide a surroundless piston-driven vibrating speaker with a new structure, so that it can get rid of the constrains of the surround in conventional speakers, avoid the bad effects like significant distortion of even resonance waves, friction, cacophony, etc., which are caused by nonlinear movement generated by the unstableness of surround materials and non-concentric installation, suppress the resonance of frame during major dynamic vibration of the speaker' decrease the depth of installation, eliminate the standing wave on the back of cone, decrease the general damp coefficient, and purify the timbre.
In order to accomplish the main obj ect, the following technical soiutions were adopted in the present invention. According to the present invention, the surroundless piston-driven vibrating speaker comprises an improved vibrating system, a supporting system, and an external magnet system, wherein the improved vibrating system comprises a voice cone 12 in the shape of "7", a voice coil 4, a central damper 5, wherein the supporting system comprises a shell frame 1 with air vents 10, a floating locating damper 6, a sound absorption cotton material 8, a damper fixing ring and a dust preventing cover 13.
Further, the technical problem solved by the present invention can also be settled by he following technical solutions.
The forementioned surroundless piston-driven vibrating speaker, wherein the voice coil 4 is a cylindrical voice coil or flat voice coil with a frame, or a no bobbin voice coil without a frame, attached at the top of the inner circle of the cone.
The forementioned surroundless piston-driven vibrating speaker, wherein the shell frame 1 has one or more air vents 10.
The forementioned surroundless piston-driven vibrating speaker, wherein the floating locating damper 6 is a wave like plate in the shape of round circle, the outer side of which is attached at the back of the edge of the voice cone12, while the inner side is attached at the upper side of the outer side of the shell 1.
The forementioned surroundless piston-driven vibrating speaker, wherein the sound absorption cotton material 8 is attached in the empty space between the voice cone12 and the shell 1.
The forementioned surroundless piston-driven vibrating speaker, wherein the damper fixing ring comprises an upper locating ring 11 and a lower locating ring 9. They have the same inner diameter which is bigger than that of the central damper 5. Their outer diameter is same as that of damper 5. The lower locating ring 9 is attached above the magnet chip 2; the central damper 5 is attached above the lower locating ring 9; the upper locating ring 11 is attached above the central damper 5.
Comparing to the present technology, the present invention has significant advantages and better effects. It can be shown by the forementioned technical solution that:
The present invention is apparently different from the conventional technical solutions. It employs a voice cone and a voice coil in the vibrating system, a locating damper in the supporting system and a central damper to compose there points (in one) coaxial resonance, and uses multi-level supporting and fixing to ensure that the vibration of speaker generate linear piston movement.
The present invention employs surroundless design in the vibrating system, so that it totally gets rid of the constrain of the surround in conventional speakers. It forms coaxial three-points locating linkage sound and directs the whole vibrating system to generate linear sounding movement by connecting the floating locating damper supported from the bottom, the central damper and the voice cone. In the whole voice conformity mechanism, besides the function of locating, the floating locating damper also functions as a second vibration facilitator. It gives the speaker better compliance, and greatly decreases the general damp coefficient. Different from the edge of surround in conventional speaker, which doesn't vibrate when sounding, the special designed voice cone ensures the vibrating sounding of the whole cone and improves the sensitivity and the voice consistency of the whole apparatus. The sound absorption cotton in the supporting system eliminating the standing wave on the back of the cone, together with a self-sealing shell which has vents, composes the back voice box of medium frequency speaker. The present invention forms independent mediant voice box after all components installed. There is no need to design the voice box separately. This makes the installation and design flexible and convenient. The air flow inside the speaker is buffered, thus disperses the standing wave and bad back reflect caused by the air flow on the back of the speaker, improves the frequency property of sound absorption cotton to get better frequency curve, and makes the speaker work independently without any additional outer condition; also, smooth frequency curve and box effect of big volume sound box can be obtained, which makes the shortcomings of conventional sealed sound box and small volume sound box, such as high Q value, dry sound and unsmooth frequency curve.
In conclusion, the surroundless piston-driven vibrating speaker according to the present invention provides, in the field with the limited technical developing space, significant improvement both in structure and function. It makes sufficient technical improvement and is feasible and easy to use, thus it has indeed improved function that makes it practical to use. It is a novel and improved practical design.
The specific implementation of the present invention can be shown using the following embodiments, with reference to the drawings attached.
Brief Description of the Drawings
  • FIG. 1 is a cross-sectional view of the present invention.
  • FIG. 2 is a front of the present invention.
  • FIG. 3 is a plan view of the present invention.
  • FIG. 4 is a bottom view of the present invention.
    • Embodiment:
    With reference to the drawings and preferred embodiment, according to the present invention, the surroundless piston-driven vibrating speaker and its implementation, structure, attributes and functions, is the illustrated in detail as follows.
    A surroundless piston-driven vibrating speaker of the present invention, including: a shell and a vibrating voice generating part. The vibrating voice generating part mainly comprises an improved vibrating system, a supporting system and an external magnet system.
    As shown in FIG. 1, the shell frame 1 is made of metal like copper or aluminum, or plastic, with air vents 10 at the side. The number of the forementioned air vents 10 should be between 1 and 10. It is 6 in this embodiment.
    External magnet system is composed of a ferrite core 2, an upper plate 3 and a T-yoke 7. The forementioned ferrite core 2 is evenly installed between the upper plate3 and the T-yoke 7. The forementioned T-yoke 7 is installed in the loop part of the voice coil 4.
    Voice cone' which is in the shape of "7", is attached in a way that its inner side of the outer edge is connected with the outer side of the floating locating damper 6, and its outer side of the inner edge is connected with the upper side of the frame of the voice coil 4. The inner side of the floating locating damper 6 is attached to the outer side of the upper end of the shell framel; the frame of the voice coil4 is around the central pole of the T-yoke.
    The lower locating ring of damper 9 and the upper locating ring of damper 11 are made of metal like copper or aluminum, or plastic. The forementioned locating ring 9 and 11 has the same inner diameter, and their outer diameter is same as that of damper. The lower locating ring 9 is attached above the ferrite core 2; the damper 5 is attached above the lower locating ring9; the upper locating ring 11 is attached above the damper 5. The upper' lower locating ring are installed clipping the outer edge of the central damper 5 at both the upper and the lower end. The damper 5 is a rippled laminate in circle shape which is made of foam, rubber, cotton adhesive plaster' silk adhesive plaster, or compound adhesive plaster with carbon fibre or fiberglass.
    The sound absorption cotton material 8 is made of plastic foam or foamed resin. It is used to fill in the space between the voice cone 12, the shell 1, the ferrite core 2 and the locating ring.
    The forementioned dust preventing cover is normal dust preventing cover for speaker. It is installed on the voice cone 12, covering the voice coil 4.
    Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will understand that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

    Claims (6)

    1. A surroundless piston-driven vibrating speaker,
      characterised in that
      the main structure has an external magnet system; the main structure also comprises a improved vibrating system and supporting system; the forementioned improved vibrating system comprises a voice cone (12) in the shape of "7", a voice coil (4), a central damper (5); the forementioned supporting system comprises a shell frame (1) with air vents, a floating locating damper (6), a sound absorption cotton material (8), a damper fixing ring and a dust preventing cover (13).
    2. The surroundless piston-driven vibrating speaker as claimed in claim 1, wherein the forementioned shell frame (1) has one or more air vents.
    3. The surroundless piston-driven vibrating speaker as claimed in claim 1 or 2, wherein the forementioned voice coil (4) is a cylindrical voice coil or flat voice coil with a structure, or a no bobbin voice coil without a frame, attached at the top of the inner edge of cone; the forementioned central damper (5) is a rippled laminate in circle shape, the outer edge of which is attached at the lower part of the outer edge of the voice cone (12).
    4. The surroundless piston-driven vibrating speaker as claimed in any one of claims 1 to 3, wherein the forementioned floating locating damper (6) is a rippled laminate in circle shape, the outer circle edge of which is attached on the back of edge of the voice cone (12), while the inner circle edge of which is attached at the upper edge of the outer edge of the shell (1).
    5. The surroundless piston-driven vibrating speaker as claimed in any one of claims 1 to 4, wherein the forementioned sound absorption cotton material 8 is filled in the space between the voice cone (12) and the shell (1).
    6. The surroundless piston-driven vibrating speaker as claimed in any one of claims 1 to 5, wherein the forementioned damper fixing ring comprises an upper locating ring (11) and a lower locating ring (9) having the same inner diameter which is bigger than that of the central damper (5), and having an outer diameter which is same as that of the central damper (5) and the lower locating ring (9) is attached above the ferrite core (2); the damper (5) is attached above the lower locating ring (9); the upper locating ring (11) is attached above the damper (5).
    EP04003091A 2003-02-17 2004-02-12 Surroundless piston-driven vibrating speaker Withdrawn EP1458215A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    CN03223604 2003-02-17
    CNU032236042U CN2607708Y (en) 2003-02-17 2003-02-17 Non-suspended rim piston type vibration loadspeaker

    Publications (2)

    Publication Number Publication Date
    EP1458215A2 true EP1458215A2 (en) 2004-09-15
    EP1458215A3 EP1458215A3 (en) 2008-03-12

    Family

    ID=32077284

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04003091A Withdrawn EP1458215A3 (en) 2003-02-17 2004-02-12 Surroundless piston-driven vibrating speaker

    Country Status (2)

    Country Link
    EP (1) EP1458215A3 (en)
    CN (1) CN2607708Y (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN113747285A (en) * 2021-09-01 2021-12-03 无锡杰夫电声股份有限公司 Middle-high frequency sound box with multiple magnets
    US12114144B2 (en) 2020-03-20 2024-10-08 Pss Belgium Nv Loudspeaker

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB465795A (en) * 1935-11-08 1937-05-10 Cinaudagraph Corp Improvements in electro-acoustical reproducers
    US2238741A (en) * 1938-02-22 1941-04-15 Gen Electric Electrodynamic transducer
    NL8600267A (en) * 1986-02-04 1987-09-01 Philips Nv ELECTRODYNAMIC CONVERTER.
    GB2315185A (en) * 1996-07-09 1998-01-21 B & W Loudspeakers Diaphragm surrounds for loudspeaker drive units

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US12114144B2 (en) 2020-03-20 2024-10-08 Pss Belgium Nv Loudspeaker
    CN113747285A (en) * 2021-09-01 2021-12-03 无锡杰夫电声股份有限公司 Middle-high frequency sound box with multiple magnets
    CN113747285B (en) * 2021-09-01 2022-07-26 无锡杰夫电声股份有限公司 Middle-high frequency sound box with multiple magnets

    Also Published As

    Publication number Publication date
    EP1458215A3 (en) 2008-03-12
    CN2607708Y (en) 2004-03-24

    Similar Documents

    Publication Publication Date Title
    US6796401B2 (en) Speaker apparatus equipped with means for producing complicated waveform of low frequency with higher improved fidelity
    CN1164144C (en) Inertial Vibration Transducer
    US2775309A (en) Sound translating devices
    CA1322588C (en) Audio transducer with controlled flexibility diaphragm
    TW573438B (en) Flat panel sound radiator with supported exciter and compliant surround
    CN101828406B (en) Recoil-free speaker system
    US5875252A (en) Loudspeaker for high frequencies
    CN102187688A (en) Flat diaphragm loudspeaker
    RO120304B1 (en) VIBRATION TRANSLATOR, INERTIAL AND DIFFUSER FOR THEIR USE
    US2084945A (en) Loudspeaker
    GB2103451A (en) Loudspeaker system for producing coherent sound
    CN110463218A (en) bone conduction speaker unit
    CN108540908A (en) A kind of sound-producing device
    WO2025175695A1 (en) Sound production unit, sound production device, and application apparatus
    US7171015B2 (en) Speaker apparatus
    US2084944A (en) Acoustic device
    CN118138968A (en) Sound-generating unit, sound-generating device and application device
    KR20030079760A (en) Entertainment sound panels
    CN209608855U (en) A kind of micro-telephone receiver
    CN210225735U (en) Passive vibrating diaphragm unit and sound box thereof
    US20020021820A1 (en) Loudspeaker
    KR102607338B1 (en) Structure of speaker including uses natural wool to control the low sound quality and radial double enclosure and artificial intelligence system that automatically designs structure of speaker according to sound quality characteristic
    JPH1098789A (en) Speaker device
    JPH1155780A (en) Speaker device
    Barlow Rigidity of loudspeaker diaphragms

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A2

    Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

    AX Request for extension of the european patent

    Extension state: AL LT LV MK

    PUAL Search report despatched

    Free format text: ORIGINAL CODE: 0009013

    AK Designated contracting states

    Kind code of ref document: A3

    Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

    AX Request for extension of the european patent

    Extension state: AL LT LV MK

    RIC1 Information provided on ipc code assigned before grant

    Ipc: H04R 7/20 20060101AFI20080201BHEP

    AKX Designation fees paid
    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

    18D Application deemed to be withdrawn

    Effective date: 20080902

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: 8566