CN101510461A - Perpendicular style electromagnetical reset coil using printed circuit board as base - Google Patents
Perpendicular style electromagnetical reset coil using printed circuit board as base Download PDFInfo
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- CN101510461A CN101510461A CNA2008102266184A CN200810226618A CN101510461A CN 101510461 A CN101510461 A CN 101510461A CN A2008102266184 A CNA2008102266184 A CN A2008102266184A CN 200810226618 A CN200810226618 A CN 200810226618A CN 101510461 A CN101510461 A CN 101510461A
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Abstract
The traditional electromagnetic transduction coil is made by helically winding a conductor and the helical shape thereof causes the current direction of the coil not to be totally vertical to the direction of the central axial line of the coil, thereby lowering the electromagnetic transduction efficiency of the coil and raising the noise of the coil during electromagnetic transduction. A electromagnetic transduction coil with a novel structure consists of the following three parts: a coil system, an electromagnetic field shielding system and an adjacent coil connecting circuit system, wherein, the electromagnetic field shielding system is positioned between the coil system and the adjacent coil connecting circuit system; the electromagnetic transduction coil adopts a printed circuit board to form the bottom edge of the coil and each edge of each circle of the coil is totally vertical to the central axial line of the coil; therefore, the current passing each edge of the electromagnetic transduction coil is totally vertical to the central axial line of the coil, and the influence of an adjacent coil connecting circuit of the electromagnetic transduction coil on the magnetic field of the coil is shielded by the electromagnetic field shielding system thereof.
Description
Technical field
The present invention relates to a kind of electromagnetic conversion coil of new structure.
Background technology
Traditional electromagnetic conversion coil adopts the conductor helically coiling to form, the spiral-shaped of its coil makes that the sense of current in this coil can not be vertical fully with the central axial direction of this coil, when using thick or broad conductor coiling electromagnetic conversion coil, the problems referred to above can be aggravated, and make that the electromagnetic conversion efficient of coil reduces, make the electromagnetic conversion noise of coil strengthen simultaneously.
Summary of the invention
The electromagnetic conversion coil of new structure described in the invention, constitute by coil system (comprising each limit of coil flux guide and coil), electromagnetic-field-shielded system and adjacent windings connecting circuit system three parts, its electromagnetic-field-shielded system is between its coil system and its adjacent windings connecting circuit system, and this electromagnetic-field-shielded system is blocked its adjacent windings connecting circuit the magnetic field of this electromagnetic conversion coil is exerted an influence.
The electromagnetic conversion coil of new structure described in the invention, the magnetic conductor of its coil is installed in the top of printed circuit board, the cross section rectangular shaped vertical of this coil with its central axis, this coil uses two sections circuit of printed circuit board top layer to constitute the base of a circle in the coil, the sense of current in these two sections circuit is vertical with this hub of a spool axis direction, this coil connects (welding respectively by two ends, crimping etc.) on these two sections circuit, and upwards constitute other limits of enclosing in the coil around coil flux guide and the tape conductor vertical with the hub of a spool axis, the sense of current in these conductors is also vertical with the central axial direction of this coil all the time, and the connection between this coil two adjacent rings is finished by the circuit and the cooperation of conduction transitional pore of other layers of printed circuit board (non-top layer).
This paper said " hub of a spool axis " is meant the straight line at the center of passing through area that every turn coil is surrounded.
The electromagnetic conversion coil of new structure described in the invention, between coil base (the top layer circuit of printed circuit board) and adjacent windings connecting circuit (the non-top layer circuit of printed circuit board), be provided with electromagnetic-field-shielded system, exert an influence with the magnetic field of blocking-up adjacent windings connecting circuit to this electromagnetic conversion coil.The electric field shielding function of this electromagnetic-field-shielded system, constitute by the whole layer metal forming between electromagnetic conversion coil base and adjacent windings connecting circuit, this metal forming is connected with the earth in the use, thereby this metal forming is the space electric field shielding that the adjacent windings connecting circuit produces, and it can not be exerted an influence to the magnetic field of the described electromagnetic conversion coil that is positioned at this metal forming opposite side.The magnetic field shielding function of this electromagnetic-field-shielded system, by the geometry closure, finish with the hollow polyhedral that permeability magnetic material (as nickel-zinc ferrite commonly used etc.) is made, make this polyhedral permeability magnetic material and have high resistivity (resistivity as nickel-zinc ferrite can reach more than 1M Ω/cm), this permeability magnetic material can be used for making the insulating barrier of printed circuit board, the printed circuit board dielectric laminated substrate that this permeability magnetic material is made, perforate in advance (forming or additive method processes) with mould compacting, and can carry out the hole metallization electroplating processes, this permeability magnetic material insulated substrate can cooperate with other conventional insulated substrates (as the epoxy resins insulation substrate) and metal forming makes multilayer printed circuit board, a face of the hollow polyhedral that this permeability magnetic material is made is an insulating barrier in the printed circuit board, this insulating barrier is between electromagnetic conversion coil base and adjacent windings connecting circuit, the connecting circuit of its adjacent windings is surrounded by this polyhedron, so magnetic field of the generation of the electric current in this adjacent windings connecting circuit, the hollow polyhedral shielding of being made by this permeability magnetic material is in this polyhedral inside, prevented that the electric current in this adjacent windings connecting circuit from exerting an influence to the magnetic field of the described electromagnetic conversion coil that is positioned at this polyhedron outside.
The electromagnetic conversion coil of new structure described in the invention, owing to adopted above-mentioned structure and material system, make that all the central axis with coil is vertical fully for each limit of each circle in this electromagnetic conversion coil, therefore this electromagnetic conversion coil midstream is crossed the electric current on each limit of every circle all the central axis with coil is vertical fully, and the adjacent windings connecting circuit of this electromagnetic conversion coil is shielded by the electromagnetic-field-shielded system of said structure the influence of this electromagnetic conversion coil magnetic field.
Concrete structure of the present invention and feature will further specify in conjunction with the accompanying drawings by the embodiment that a wire circle that adopts four layers of printed circuit board be eight circles, and these embodiment only are used for illustrating the present invention, and do not limit scope of the present invention.
Each functional part in the described electromagnetic conversion coil of embodiment and accompanying drawing, also can adopt corresponding multilayer material to make, to strengthen its function corresponding, the shape of the circuitry shapes on its coil base and its adjacent windings connecting circuit also can adopt other shape with same circuits function.
Description of drawings
Fig. 1 is to be the rectilinear electromagnetic conversion coil schematic appearance on base with the printed circuit board, wherein:
The 1st, around 2 and all vertical tape conductor in each limit with the hub of a spool axis;
The 2nd, the magnetic conductor of coil;
The 3rd, the base of coil is the top layer circuit of printed circuit board;
The 4th, the insulating barrier between printed circuit board ground floor conductor and the second layer conductor;
The 5th, the electric field shielding layer of adjacent windings connecting circuit is the conductor layer of printed circuit board;
The 6th, the end face of the magnetic field shielding hollow polyhedral of adjacent windings connecting circuit is made with the permeability magnetic material of high resistivity, is the insulating barrier of printed circuit board;
The 7th, make with the permeability magnetic material of high resistivity the bottom of the magnetic field shielding hollow polyhedral of adjacent windings connecting circuit, and 7 and 6 closures are surrounded the adjacent windings connecting circuit, constitutes the magnetic field shielding system of adjacent windings connecting circuit.
Fig. 2 is to be the printed circuit board layering of rectilinear electromagnetic conversion coil on base and the profile of electromagnetic-field-shielded architecture with the printed circuit board, wherein:
The 3rd, the conductor layer at printed circuit board top, the base of formation coil;
The 4th, the insulating barrier between printed circuit board ground floor conductor and the second layer conductor adopts conventional insulating material to make;
The 5th, printed circuit board second layer conductor layer, the electric field shielding layer of formation adjacent windings connecting circuit, this layer is connected with the earth in the use;
The 6th, the insulating barrier between printed circuit board second layer conductor and the 3rd layer of conductor adopts the permeability magnetic material of high resistivity to make, and this insulating barrier also is the end face of the magnetic field shielding hollow polyhedral of adjacent windings connecting circuit;
The 7th, the bottom of the magnetic field shielding hollow polyhedral of adjacent windings connecting circuit adopts the permeability magnetic material of high resistivity to make, and 7 and 6 closures are surrounded the magnetic field shielding system of formation 8 and 10 with 8,9 and 10;
The 8th, the 3rd layer of conductor layer of printed circuit board, the circuit of this layer are connected the connecting circuit of component part adjacent windings by corresponding conduction transitional pore with the related circuit of printed circuit board top layer respectively;
The 9th, the insulating barrier between the 3rd layer of conductor of printed circuit board and the 4th layer of conductor adopts conventional insulating material to make;
The 10th, the 4th layer of conductor layer of printed circuit board, the circuit of this layer are connected the connecting circuit of component part adjacent windings by corresponding conduction transitional pore with the related circuit of printed circuit board top layer respectively;
8,9 and 10 size is smaller than the size of each layer above it, can put into the magnetic field shielding hollow polyhedral that is made of 6 and 7 closures.
Fig. 3 is to be the top layer circuitous pattern of printed circuit board of the rectilinear electromagnetic conversion coil on base with the printed circuit board, and this layer circuit constitutes the base of this coil, and wherein black part is divided into conductor, and circular hole is the conduction transitional pore, and other parts are the insulating material substrate.
Fig. 4 is to be the second layer circuitous pattern of printed circuit board of the rectilinear electromagnetic conversion coil on base with the printed circuit board, this layer circuit constitutes the electric field shielding layer of adjacent windings connecting circuit, wherein black part is divided into conductor, there is the inner ring of the white circular hole of inner ring to be the conduction transitional pore in the conductor, the outer ring that the white circular hole of inner ring is arranged in the conductor is the screen conductor edge, have in the conductor between the inner ring of white circular hole of inner ring and the outer ring and be the insulating material substrate, the white circular hole that does not have inner ring in the conductor is the conduction transitional pore, and this layer conductor is connected with the earth by the conduction transitional pore in use.
Fig. 5 is to be the 3rd layer of circuitous pattern of printed circuit board of the rectilinear electromagnetic conversion coil on base with the printed circuit board, this layer circuit is the part of adjacent windings connecting circuit, wherein black part is divided into conductor, and circular hole is the conduction transitional pore, and other parts are the insulating material substrate.
Fig. 6 is to be the 4th layer of circuitous pattern of printed circuit board of the rectilinear electromagnetic conversion coil on base with the printed circuit board, this layer circuit is the part of adjacent windings connecting circuit, wherein black part is divided into conductor, and circular hole is the conduction transitional pore, and other parts are the insulating material substrate.
Fig. 7 is the relative position schematic diagram that has the printed circuit board top layer circuitous pattern of mark, be used to illustrate operation principle of the present invention, wherein black part is divided into conductor, circular hole is the conduction transitional pore, other parts are the insulating material substrate, dotted line among the figure is the position projection line of coil flux guide, and each mark is defined as follows among Fig. 7:
A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15 and A16 are circuit conductors;
H1-3A, H1-3B, H1-3C, H1-3D, H1-3E, H1-3F, H1-3G and H1-3H are the conduction transition blind holes between top layer circuit conductor and the 3rd layer of circuit conductor;
H1-4A, H1-4B, H1-4C, H1-4D, H1-4E and H1-4F are the conduction transition through holes between top layer circuit conductor and the 4th layer of circuit conductor;
H1-2 is the conduction transition blind hole between top layer circuit conductor and the second layer circuit conductor.
Fig. 8 is the relative position schematic diagram that has the printed circuit board second layer circuitous pattern of mark, be used to illustrate operation principle of the present invention, wherein black part is divided into conductor, there is the inner ring of the white circular hole of inner ring to be the conduction transitional pore in the conductor, the outer ring that the white circular hole of inner ring is arranged in the conductor is the screen conductor edge, have in the conductor between the inner ring of white circular hole of inner ring and the outer ring and be the insulating material substrate, the white circular hole that does not have inner ring in the conductor is the conduction transitional pore, dotted line among the figure is the position projection line of coil flux guide, and each mark is defined as follows among Fig. 8:
B is a circuit conductor;
H1-3A, H1-3B, H1-3C, H1-3D, H1-3E, H1-3F, H1-3G and H1-3H are the conduction transition blind holes between top layer circuit conductor and the 3rd layer of circuit conductor, and they all insulate with B;
H1-4A, H1-4B, H1-4C, H1-4D, H1-4E and H1-4F are the conduction transition through holes between top layer circuit conductor and the 4th layer of circuit conductor, and they all insulate with B;
H1-2 is the conduction transition blind hole between top layer circuit conductor and the B, and B is connected with the earth by H1-2 in use.
Fig. 9 is the relative position schematic diagram that has the 3rd layer of circuitous pattern of printed circuit board of mark, be used to illustrate operation principle of the present invention, wherein black part is divided into conductor, circular hole is the conduction transitional pore, other parts are the insulating material substrate, dotted line among the figure is the position projection line of coil flux guide, and each mark is defined as follows among Fig. 9:
C1, C2, C3 and C4 are circuit conductors;
H1-3A and H1-3B are the conduction transition blind holes between top layer circuit conductor and the C1;
H1-3C and H1-3D are the conduction transition blind holes between top layer circuit conductor and the C2;
H1-3E and H1-3F are the conduction transition blind holes between top layer circuit conductor and the C3;
H1-3G and H1-3H are the conduction transition blind holes between top layer circuit conductor and the C4;
H1-4A, H1-4B, H1-4C, H1-4D, H1-4E and H1-4F are the conduction transition through holes between top layer circuit conductor and the 4th layer of circuit conductor, and these six conduction transition through holes all insulate with C1, C2, C3 and C4.
Figure 10 is the relative position schematic diagram that has the 4th layer of circuitous pattern of printed circuit board of mark, be used to illustrate operation principle of the present invention, wherein black part is divided into conductor, circular hole is the conduction transitional pore, other parts are the insulating material substrate, dotted line among the figure is the position projection line of coil flux guide, and each mark is defined as follows among Figure 10:
D1, D2 and D3 are circuit conductors;
H1-4A and H1-4B are the conduction transition through holes between top layer circuit conductor and the D1;
H1-4C and H1-4D are the conduction transition through holes between top layer circuit conductor and the D2;
H1-4E and H1-4F are the conduction transition through holes between top layer circuit conductor and the D3.
Embodiment
As shown in Figure 1,2 are installed in the top of printed circuit board, and 1 is connected with 3, constitutes each circle of electromagnetic conversion coil of the present invention.
As Fig. 7, Fig. 8, Fig. 9 and shown in Figure 10, A1 is an end of coil, and A16 is the other end of coil, and the connected mode of each circle of coil is as described below:
A1 is by all being connected with A2 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit, the first lap of formation coil, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing;
A2 is connected with C1 by H1-3A, and C1 is connected with A3 by H1-3B;
A3 constitutes second of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A4 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit;
A4 is connected with D1 by H1-4A, and D1 is connected with A5 by H1-4B;
A5 constitutes the 3rd of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A6 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit;
A6 is connected with C2 by H1-3C, and C2 is connected with A7 by H1-3D;
A7 constitutes the 4th of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A8 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit;
A8 is connected with D2 by H1-4C, and D2 is connected with A9 by H1-4D;
A9 constitutes the 5th of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A10 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit;
A10 is connected with C3 by H1-3E, and C3 is connected with A11 by H1-3F;
A11 constitutes the 6th of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A12 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit;
A12 is connected with D3 by H1-4E, and D3 is connected with A13 by H1-4F;
A13 constitutes the 7th of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A14 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit;
A14 is connected with C4 by H1-3G, and C4 is connected with A15 by H1-3H;
A15 constitutes the 8th of coil and enclose, so all the central axis with coil is vertical to be somebody's turn to do each limit of enclosing by all being connected with A16 with the vertical tape conductor of hub of a spool axis around coil flux guide and each limit.
As shown in Figure 2,8 and 10 are surrounded by the hollow polyhedral of 6 and 7 closures, because 6 and 7 use permeability magnetic materials to make, so the magnetic field shielding that this polyhedron produces electric current in 8 and 10 is in the hollow polyhedral that this permeability magnetic material is made.
As shown in Figure 2, in use, 5 are connected with the earth, so 5 have its effect of isolating of space electric field of two lateral circuits up and down, promptly 5 isolate 8 and 10 space electric fields that produce, and avoid it that circuit that is positioned at 5 opposite sides is exerted an influence.
In sum, all the central axis with coil is vertical on each limit of each circle in the electromagnetic conversion coil of new structure described in the invention, therefore this electromagnetic conversion coil midstream is crossed the electric current on each limit of every circle all the central axis with coil is vertical, and the adjacent windings connecting circuit of this electromagnetic conversion coil is to the influence of coil magnetic field, and the electromagnetic-field-shielded system that is had by this coil shields.
Claims (2)
1. electromagnetic conversion coil, it is characterized in that, this coil is by the coil system, electromagnetic-field-shielded system and adjacent windings connecting circuit system three parts constitute, its electromagnetic-field-shielded system is between its coil system and its adjacent windings connecting circuit system, this electromagnetic-field-shielded system can shield the influence of its adjacent windings connecting circuit to this coil magnetic field, in this coil, the magnetic conductor of its coil is installed in a side of printed circuit board, the cross section rectangular shaped vertical of this coil with its central axis, this coil uses the outer field two sections circuit of printed circuit board to constitute the base of a circle in the coil, the sense of current in these two sections circuit is vertical with this hub of a spool axis direction, this coil is connected on these two sections circuit by two ends, and constitute other limits of a circle in the coil around coil flux guide and the tape conductor vertical with the hub of a spool axis, the sense of current in these conductors is also vertical with the central axial direction of this coil all the time, connection between this coil two adjacent rings, circuit and the cooperation of conduction transitional pore by other layers of printed circuit board are finished, between coil base and adjacent windings connecting circuit, be provided with electromagnetic-field-shielded system, the electric field shielding function of this electromagnetic-field-shielded system, constitute by the whole layer metal forming between coil base and adjacent windings connecting circuit, this metal forming is connected with the earth in the use, thereby this metal forming shields the space electric field that the adjacent windings connecting circuit produces, it can not be exerted an influence to the magnetic field of the described electromagnetic conversion coil that is positioned at this metal forming opposite side, the magnetic field shielding function of this electromagnetic-field-shielded system, by the geometry closure, finish with the hollow polyhedral that permeability magnetic material is made, make this polyhedral permeability magnetic material and have high resistivity, this permeability magnetic material can be used for making the insulating barrier of printed circuit board, the printed circuit board dielectric laminated substrate that this permeability magnetic material is made, perforate in advance also can be carried out the hole metallization electroplating processes, this permeability magnetic material insulated substrate can cooperate with other conventional insulated substrates and metal forming makes multilayer printed circuit board, a face of the hollow polyhedral that this permeability magnetic material is made is an insulating barrier in the printed circuit board, this insulating barrier is between coil base and adjacent windings connecting circuit, the connecting circuit of its adjacent windings is surrounded by this polyhedron, so magnetic field of the generation of the electric current in this adjacent windings connecting circuit, the hollow polyhedral of being made by this permeability magnetic material shields in this polyhedral inside, prevented that the electric current in this adjacent windings connecting circuit from exerting an influence to the magnetic field of the described electromagnetic conversion coil that is positioned at this polyhedron outside, this coil is owing to adopted above-mentioned structure and material system, make that all the central axis with coil is vertical for each limit of each circle in this coil, therefore this coil midstream is crossed the electric current on each limit of every circle all the central axis with coil is vertical, and the adjacent windings connecting circuit of this coil is shielded by its electromagnetic-field-shielded system that has the influence of described electromagnetic conversion coil magnetic field.
2. according to the multilayer printed circuit board with interlayer magnetic field shielding function of claim 1, it is characterized in that, this printed board has the function of its partial circuit layer being carried out magnetic field shielding, this magnetic field shielding function, by the geometry closure, finish with the hollow polyhedral that permeability magnetic material is made, make this polyhedral permeability magnetic material and have high resistivity, can be used for making the insulating barrier of printed circuit board, the printed circuit board dielectric laminated substrate that this permeability magnetic material is made, perforate in advance also can be carried out the hole metallization electroplating processes, this permeability magnetic material insulated substrate can cooperate with other conventional insulated substrates and metal forming makes multilayer printed circuit board, a face of the hollow polyhedral that this permeability magnetic material is made is an insulating barrier in the printed circuit board, this insulating barrier is between conductively-closed circuit layer and non-screened circuit layer, its conductively-closed circuit layer is surrounded by this polyhedron, so magnetic field that electric current produces in this conductively-closed circuit layer, the hollow polyhedral of being made by this permeability magnetic material shields in this polyhedral inside, thereby has realized the partial circuit layer in the multilayer printed circuit board is carried out the function of magnetic field shielding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102266184A CN101510461B (en) | 2008-11-18 | 2008-11-18 | Perpendicular style electromagnetical reset coil using printed circuit board as base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102266184A CN101510461B (en) | 2008-11-18 | 2008-11-18 | Perpendicular style electromagnetical reset coil using printed circuit board as base |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101510461A true CN101510461A (en) | 2009-08-19 |
| CN101510461B CN101510461B (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102266184A Expired - Fee Related CN101510461B (en) | 2008-11-18 | 2008-11-18 | Perpendicular style electromagnetical reset coil using printed circuit board as base |
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| Country | Link |
|---|---|
| CN (1) | CN101510461B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105706196A (en) * | 2013-11-08 | 2016-06-22 | 三菱电机株式会社 | Electromagnetic induction apparatus |
| CN109856441A (en) * | 2019-04-15 | 2019-06-07 | 华北电力大学 | Crimp type IGBT device chip current on-line measurement system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242582A (en) * | 1999-07-13 | 2000-01-26 | 谢天红 | Magnetic enamel-covered wire and coil, producing method and use therefor |
| US6696910B2 (en) * | 2001-07-12 | 2004-02-24 | Custom One Design, Inc. | Planar inductors and method of manufacturing thereof |
| JP2004119940A (en) * | 2002-09-30 | 2004-04-15 | Mitsumi Electric Co Ltd | Inductance element |
-
2008
- 2008-11-18 CN CN2008102266184A patent/CN101510461B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105706196A (en) * | 2013-11-08 | 2016-06-22 | 三菱电机株式会社 | Electromagnetic induction apparatus |
| CN105706196B (en) * | 2013-11-08 | 2018-04-10 | 三菱电机株式会社 | Electromagnetic induction device |
| CN109856441A (en) * | 2019-04-15 | 2019-06-07 | 华北电力大学 | Crimp type IGBT device chip current on-line measurement system |
| CN109856441B (en) * | 2019-04-15 | 2024-05-10 | 华北电力大学 | Crimping type IGBT device chip current online measurement system |
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| Publication number | Publication date |
|---|---|
| CN101510461B (en) | 2010-12-29 |
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Granted publication date: 20101229 Termination date: 20121118 |