CN109151683A - Manufacturing method, loudspeaker and the electronic equipment of loudspeaker radiator structure - Google Patents
Manufacturing method, loudspeaker and the electronic equipment of loudspeaker radiator structure Download PDFInfo
- Publication number
- CN109151683A CN109151683A CN201811032483.8A CN201811032483A CN109151683A CN 109151683 A CN109151683 A CN 109151683A CN 201811032483 A CN201811032483 A CN 201811032483A CN 109151683 A CN109151683 A CN 109151683A
- Authority
- CN
- China
- Prior art keywords
- loudspeaker
- magnet
- heat
- conducting layer
- radiator structure
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 26
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910017083 AlN Inorganic materials 0.000 claims abstract description 10
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004593 Epoxy Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 230000017525 heat dissipation Effects 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 238000005488 sandblasting Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000012546 transfer Methods 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention discloses manufacturing method, loudspeaker and the electronic equipments of a kind of loudspeaker radiator structure, 3% Graphene powder and 2% aluminium nitride or alumina powder are added in the epoxy, and stir into paste, and by speaker magnets surface sand-blasting process at rough surface, then paste is coated uniformly on magnet surface and forms heat-conducting layer, then magnet is toasted, heat-conducting layer is made to condense in magnet surface.Due to the superhigh radiating performance of graphene, along with coarse magnet surface significantly increases the cooling surface area of magnet, the thermal diffusivity of loudspeaker can be significantly improved, reduce the operating temperature of loudspeaker, either make loudspeaker in the case where power improves or volume reduces, temperature will not be significantly raised, is conducive to the miniaturization of loudspeaker, to promote the miniaturization of the electronic equipment including loudspeaker.
Description
Technical field
The present invention relates to loudspeaker techniques more particularly to a kind of manufacturing method, loudspeaker and the electricity of loudspeaker radiator structure
Sub- equipment.
Background technique
Present almost all of electronic product all develops toward the direction of miniaturization, panelized.Various electronic components
For this reason, it is necessary to reduce own vol, but must assure that power and quality as large scale component again simultaneously.
The loudspeaker crucial sounding component indispensable as consumption electronic product, it is also necessary to follow this principle, guarantee power not
It is imperative to reduce volume under the premise of change.
Under the premise of power is constant, loudspeaker, which reduces volume, means the sounding density in the unit volume of loudspeaker more
Greatly, the fever of simultaneous is also more serious.Since inside loudspeakers coil is bonded together by colloid, temperature is more than
It will lead to colloid thawing at 120 degree, colloid solidifies again after temperature reduces, and influences whether the vibration of inside loudspeakers sound generating mechanism
Dynamic response even fails so as to cause loudspeaker distortions.Therefore, loudspeaker is in the case where the constant volume of power reduces how
Operating temperature is effectively reduced into a very severe problem, there is presently no effective schemes for the prior art to solve
This problem.
Summary of the invention
Present invention is primarily aimed at, manufacturing method, loudspeaker and the electronic equipment of a kind of loudspeaker radiator structure are provided,
To improve the thermal diffusivity of loudspeaker.
The present invention is achieved through the following technical solutions:
A kind of manufacturing method of loudspeaker radiator structure, comprising:
Step 1: 3% Graphene powder and 2% aluminium nitride or alumina powder being added in the epoxy, and stirs into paste；
Step 2: blasting treatment being carried out to the magnet surface of loudspeaker, the magnet surface is made to form rough surface；
Step 3；The paste is coated uniformly in the magnet surface, heat-conducting layer is formed；
Step 4: the magnet being toasted, the heat-conducting layer is made to condense in the magnet surface.
Further, the granularity of the Graphene powder is -1000 mesh of 300 mesh.
Further, in the step 1, mixing time is 30 minutes.
Further, in the step 4, baking temperature is 80 degree.
A kind of loudspeaker based on graphene heat dissipation, the loudspeaker includes magnet, and the magnet surface is rough surface,
The magnet surface is stained with heat-conducting layer, contains Graphene powder in the heat-conducting layer.
Further, the granularity of the Graphene powder is -1000 mesh of 300 mesh.
A kind of electronic equipment, including loudspeaker as described above.
Compared with prior art, 3% Graphene powder and 2% aluminium nitride or aluminium oxide is added in the present invention in the epoxy
Powder, and paste is stirred into, and then paste is coated uniformly on by speaker magnets surface sand-blasting process at rough surface
Magnet surface forms heat-conducting layer, then toasts magnet, heat-conducting layer is made to condense in magnet surface.Due to the superhigh radiating of graphene
Performance can significantly improve the heat dissipation of loudspeaker along with coarse magnet surface significantly increases the cooling surface area of magnet
Property, the operating temperature of loudspeaker is reduced, either making loudspeaker, temperature will not be bright in the case where power improves or volume reduces
It is aobvious to increase, be conducive to the miniaturization of loudspeaker, to promote the miniaturization of the electronic equipment including loudspeaker.
Detailed description of the invention
Fig. 1 is the flow diagram of the manufacturing method of loudspeaker radiator structure of the present invention；
Fig. 2 is that the present invention is based on the structural schematic diagrams of the loudspeaker of graphene heat dissipation.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail.
As shown in Figure 1, Figure 2, the manufacturing method of loudspeaker radiator structure provided in an embodiment of the present invention, comprising:
Step 1: 3% Graphene powder and 2% aluminium nitride or alumina powder being added in the epoxy, and stirs into paste.
Step 1 is to prepare Heat Conduction Material.Graphene has super-high heat-conductive coefficient and heat-sinking capability, and since carbon material leads at high temperature
The often outside radiations heat energy in the form of far infrared, therefore its heat-sinking capability is much higher than other substances.And epoxy resin is in paste
In play adhesive attraction, graphene can be effectively adhered to 1 surface of speaker magnets, therefore using epoxy resin as substrate,
3% Graphene powder is wherein added, the granularity of Graphene powder is preferably -1000 mesh of 300 mesh.But epoxy resin is to heat transfer
On to Graphene powder have certain inhibition, therefore, at the same be also added into the epoxy 2% aluminium nitride or aluminium oxide
Powder, aluminium nitride and aluminium oxide are all the excellence conductors of heat, and aluminum nitride powder and alumina powder particle are fine and smooth, can effectively make up by
The loss of the thermal conductivity caused by epoxy resin.Above-mentioned 3% and 2% is all using the weight of epoxy resin as calculating benchmark, i.e., in epoxy
In resin be added weight be weight epoxy 3% Graphene powder and weight be weight epoxy 2% aluminium nitride or
Alumina powder.After epoxy resin is added in Graphene powder and aluminium nitride or alumina powder, paste can be sufficiently stirred by sand mill
Shape object, to obtain Heat Conduction Material.To ensure that three uniformly mixes, mixing time is preferably greater than or equal to 30 minutes.
Step 2: blasting treatment being carried out to 1 surface of magnet of loudspeaker, 1 surface of magnet is made to form rough surface.It can pass through
Sand-blasting machine carries out blasting treatment to 1 surface of magnet, and sand-blasting machine impacts 1 surface of magnet using the sand flow of high speed injection, energy
The impurity for enough removing 1 surface of magnet, is conducive to Heat Conduction Material and is attached to 1 surface of magnet.Meanwhile passing through the sand flow pair of high speed injection
The impact on 1 surface of magnet can also make 1 surface of magnet form rough surface, form similar flakey or fin-shaped on 1 surface of magnet
Bulge-structure 2.According to the difference of abrasive in sand flow jet velocity and sand flow, can be formed on 1 surface of magnet different thick
The surface of rugosity.1 surface of speaker magnets is more coarse, is just more obvious in the bulge-structure 2 that 1 surface of magnet is formed, the table of magnet 1
Area is bigger, and 1 heat dissipation area of magnet is bigger, and 1 thermal diffusivity of magnet is better.Since the fever of loudspeaker focuses primarily upon magnetic
1 part of body, therefore, 1 surface of speaker magnets is more coarse, and the thermal diffusivity of loudspeaker also can be better.
Step 3；Paste is coated uniformly on 1 surface of magnet, heat-conducting layer is formed.Heat-conducting layer attachment based on graphene
On shaggy 1 surface of magnet, both has the function of improving thermal diffusivity, the heat dissipation performance of loudspeaker will be significantly improved.
Step 4: magnet 1 being toasted, heat-conducting layer is made to condense in 1 surface of magnet.Baking can be carried out in oven, baking temperature
Preferably 80 degree of degree.
Fig. 2 show a kind of loudspeaker based on graphene heat dissipation, and loudspeaker includes magnet 1, and magnet 1 passes through the above method
Processed, so that 1 surface of magnet is rough surface, 1 surface adhesion of magnet has heat-conducting layer, contains Graphene powder in heat-conducting layer.Stone
The granularity of black alkene powder is -1000 mesh of 300 mesh.Also contain above-mentioned aluminium nitride or alumina powder in heat-conducting layer.
Five test points of A, B, C, D, E, F in conventional loudspeakers are tested respectively, in the case where 40 degree of room temperature,
Degradation is carried out to loudspeaker with 1KHz signal.The 1 hour rear speaker temperature that works enters stable state.A, B at this time, C,
D, 5 points of E of temperature is 98 degree, 110 degree, 123 degree, 109 degree and 99 degree respectively.Then the conventional loudspeakers are passed through into above-mentioned side
It is similarly tested after method processing, test data are as follows: the temperature that 5 points of A, B, C, D, E is 82 degree, 89 degree, 95 degree, 90 respectively
It spends and 83 degree.In addition, testing the loudspeaker of traditional 10 watts 6 ohm and 12 watts 6 ohm of two kinds of specifications, in power invariant
In the case that product reduces 50%, maximum temperature rises to 120 degree or so by original 95 degree.But two kinds of loudspeaker are passed through upper
It is similarly tested after stating method processing, maximum temperature has been restored to the level of 90-95 degree or so again.It can by comparative test
To see, after handling using method provided by the invention speaker magnets 1, the heat dissipation of loudspeaker can be significantly improved
Property, the operating temperature of loudspeaker is reduced, making loudspeaker, temperature will not increase in the case where the constant volume of power reduces, and guarantee
Loudspeaker is small the case where reducing volume to be can work normally.
The embodiment of the invention also provides a kind of electronic equipment, including loudspeaker as above.
Above-described embodiment is only preferred embodiment, the protection scope being not intended to limit the invention, in spirit of the invention
With any modifications, equivalent replacements, and improvements made within principle etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of manufacturing method of loudspeaker radiator structure characterized by comprising
Step 1: 3% Graphene powder and 2% aluminium nitride or alumina powder being added in the epoxy, and stirs into paste；
Step 2: blasting treatment being carried out to the magnet surface of loudspeaker, the magnet surface is made to form rough surface；
Step 3；The paste is coated uniformly in the magnet surface, heat-conducting layer is formed；
Step 4: the magnet being toasted, the heat-conducting layer is made to condense in the magnet surface.
2. the manufacturing method of loudspeaker radiator structure as described in claim 1, which is characterized in that the granularity of the Graphene powder
For -1000 mesh of 300 mesh.
3. the manufacturing method of loudspeaker radiator structure as described in claim 1, which is characterized in that in the step 1, when stirring
Between be 30 minutes.
4. the manufacturing method of loudspeaker radiator structure as described in claim 1, which is characterized in that in the step 4, baking temperature
Degree is 80 degree.
5. a kind of loudspeaker based on graphene heat dissipation, the loudspeaker includes magnet, which is characterized in that the magnet surface is
Rough surface, the magnet surface are stained with heat-conducting layer, contain Graphene powder in the heat-conducting layer.
6. loudspeaker as claimed in claim 5, which is characterized in that the granularity of the Graphene powder is -1000 mesh of 300 mesh.
7. a kind of electronic equipment, which is characterized in that including the loudspeaker as described in any in claim 5-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032483.8A CN109151683A (en) | 2018-09-05 | 2018-09-05 | Manufacturing method, loudspeaker and the electronic equipment of loudspeaker radiator structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032483.8A CN109151683A (en) | 2018-09-05 | 2018-09-05 | Manufacturing method, loudspeaker and the electronic equipment of loudspeaker radiator structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109151683A true CN109151683A (en) | 2019-01-04 |
Family
ID=64826992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811032483.8A Pending CN109151683A (en) | 2018-09-05 | 2018-09-05 | Manufacturing method, loudspeaker and the electronic equipment of loudspeaker radiator structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109151683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933568A (en) * | 2019-12-10 | 2020-03-27 | 歌尔股份有限公司 | Speaker and audio device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102001A (en) * | 2010-12-03 | 2011-06-22 | 烟台德邦科技有限公司 | High thermal conductivity graphene-based epoxy resin adhesive and preparation method thereof |
| KR20140115216A (en) * | 2013-03-20 | 2014-09-30 | 인하대학교 산학협력단 | Epoxy composite and manufacturing method thereof |
| CN105514066A (en) * | 2016-01-19 | 2016-04-20 | 合肥微晶材料科技有限公司 | Composite graphene infrared radiation and heat conduction film and manufacturing method thereof |
| CN105702644A (en) * | 2016-02-18 | 2016-06-22 | 东莞迪蜂金属材料科技有限公司 | Aluminium alloy graphite alkene heat radiation product and manufacture method |
| CN205793317U (en) * | 2016-06-13 | 2016-12-07 | 广州市锐丰音响科技股份有限公司 | Novel T ferrum, speaker and audio-frequence player device |
| CN106380871A (en) * | 2016-10-09 | 2017-02-08 | 安徽四新电子有限责任公司 | Rapid cooling capacitor |
| CN107384135A (en) * | 2017-09-07 | 2017-11-24 | 深圳市嘉达高科产业发展有限公司 | Heat-conductive coating and preparation method thereof |
| CN108189518A (en) * | 2017-12-29 | 2018-06-22 | 三河市华隆豪立泰新材料科技有限公司 | Graphene electromagnetic shield cloth and its manufacturing method |
| CN208924489U (en) * | 2018-09-05 | 2019-05-31 | 深圳市烽火宏声科技有限公司 | Loudspeaker and electronic equipment based on graphene heat dissipation |
-
2018
- 2018-09-05 CN CN201811032483.8A patent/CN109151683A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102001A (en) * | 2010-12-03 | 2011-06-22 | 烟台德邦科技有限公司 | High thermal conductivity graphene-based epoxy resin adhesive and preparation method thereof |
| KR20140115216A (en) * | 2013-03-20 | 2014-09-30 | 인하대학교 산학협력단 | Epoxy composite and manufacturing method thereof |
| CN105514066A (en) * | 2016-01-19 | 2016-04-20 | 合肥微晶材料科技有限公司 | Composite graphene infrared radiation and heat conduction film and manufacturing method thereof |
| CN105702644A (en) * | 2016-02-18 | 2016-06-22 | 东莞迪蜂金属材料科技有限公司 | Aluminium alloy graphite alkene heat radiation product and manufacture method |
| CN205793317U (en) * | 2016-06-13 | 2016-12-07 | 广州市锐丰音响科技股份有限公司 | Novel T ferrum, speaker and audio-frequence player device |
| CN106380871A (en) * | 2016-10-09 | 2017-02-08 | 安徽四新电子有限责任公司 | Rapid cooling capacitor |
| CN107384135A (en) * | 2017-09-07 | 2017-11-24 | 深圳市嘉达高科产业发展有限公司 | Heat-conductive coating and preparation method thereof |
| CN108189518A (en) * | 2017-12-29 | 2018-06-22 | 三河市华隆豪立泰新材料科技有限公司 | Graphene electromagnetic shield cloth and its manufacturing method |
| CN208924489U (en) * | 2018-09-05 | 2019-05-31 | 深圳市烽火宏声科技有限公司 | Loudspeaker and electronic equipment based on graphene heat dissipation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933568A (en) * | 2019-12-10 | 2020-03-27 | 歌尔股份有限公司 | Speaker and audio device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7053579B2 (en) | Heat transfer member and heat dissipation structure including it | |
| US7706144B2 (en) | Heat dissipation system and related method | |
| JP4528397B2 (en) | Bonding method and electronic component | |
| CN107936777B (en) | Three-dimensional network porous heat conduction and dissipation device and preparation method thereof | |
| CN102664055B (en) | Conductive silver paste, method for preparing same and surface metallization method for microwave dielectric ceramics | |
| JP2002069392A (en) | Heat-conductive adhesive film, method for producing the same and electronic part | |
| JP2017519888A (en) | Thermal interface material with mixed aspect ratio particle dispersion | |
| CN104972709B (en) | Ripple composite membrane and its manufacture method are inhaled in height radiating | |
| CN102664056B (en) | Conductive silver paste, preparation method of conductive silver paste, and surface metallization method for microwave dielectric ceramic | |
| JP2000281995A (en) | Thermally conductive adhesive film and semiconductor device | |
| JPH11335472A (en) | Electromagnetic wave-absorbing and heat conductive silicone gel-molded sheet and production thereof | |
| JP2000195998A (en) | Heat conductive sheet, its manufacture, and semiconductor device | |
| CN208924489U (en) | Loudspeaker and electronic equipment based on graphene heat dissipation | |
| CN109151683A (en) | Manufacturing method, loudspeaker and the electronic equipment of loudspeaker radiator structure | |
| CN105916351A (en) | Shielding case and mobile terminal | |
| JP2010183033A (en) | Composition for electromagnetic wave suppression and heat dissipation, and method for manufacturing the composition for electromagnetic wave suppression | |
| CN112888760A (en) | Heat radiating material, method for manufacturing heat radiating material, heat radiating material set, and heat generating body | |
| JP3520257B2 (en) | Manufacturing method of multifunctional sheet | |
| JP2001068888A (en) | Electromagnetic wave absorbing body | |
| CN107083204A (en) | A kind of Heat dissipation adhesive tape | |
| JP2915665B2 (en) | A method for manufacturing an insulating sheet and a metal wiring board using the same. | |
| CN111171654A (en) | Water-based graphene super-hydrophobic heat dissipation coating, preparation method thereof and testing device | |
| WO2005015112A1 (en) | Heat radiating member, device using the heat radiating member, casing, computer support stand, and radiating member manufacturing method | |
| JPH11121953A (en) | Heat dissipating spacer | |
| JP2020072196A (en) | Heat conduction sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |