baber/WOPTO huggingface dataset:
Patent JP-2005521298-A (JP)
Title: デジタル位相変調（ｐｓｋ）信号をデジタル振幅変調（ａｓｋ）信号に変換するためのシステムとその方法
IPC: H04L27/06
Filed: 2002-03-15
Abstract: 【課題】デジタル位相変調（ＰＳＫ）信号をデジタル振幅変調（ＡＳＫ）信号に変換する装置のシステムとその方法。 【解決手段】当該発明は、デジタル位相変調（ＰＳＫ）信号をデジタル振幅変調（ＡＳＫ）信号に変換するシステムと、その方法に関するものであり、ＢＰＳＫからＡＳＫへの変換器の最も単純な方式では、搬送波信号の周波数の半分をｆとするとき、２ｆの周波数のＢＰＳＫ信号を注入する入力部を持つパワーディバイダＰＤＩＶ（電力分配器）を含むことを特徴とする。このＰＤＩＶの第１出力信号ｉ１は第１アーギュメントディバイダＤｉｖ１に接続され、自走共振周波数が２分周され、第２出力信号ｉ２は第２アーギュメントデバイダＤｉｖ２に接続され、自走共振周波数が２分周される。ｉ１とｉ２は同一の振幅、周波数、位相を持ち、第１デバイダＤｉｖ１の出力信号Ｏ１と第２デバイダＤｉｖ２の出力信号Ｏ２の周波数はｆであり、両者の位相差は入力信号の位相変移に依存するが、０°または１８０°となる。   この二つの信号Ｏ１、Ｏ２はパワーコンバイナＰＣ１の入力部に接続されており、ＰＣ１の出力は、この２つの信号Ｏ１とＯ２の和となる。これらの信号の位相差が０°であれば、ＰＣ１内部で強め合い干渉が起こり、また１８０°であれば、ＰＣ１内部で弱め合い干渉が起こり、合成された信号は、ＡＳＫ信号となる。
Patent JP-2005520900-A (JP)
IPC: C04B24/26
Filed: 2003-03-19
Abstract: Polymer (I), in a solid aggregation state, produced by reacting at least one monomer (a), i.e. an unsaturated mono- or di-carboxylic acid, or analog; at least one monomer (b), i.e. an unsaturated ester or amide of a polymer (B) with one end blocked by a group that is not reactive under normal conditions and, at the other end, a hydroxy or amino group, optionally also an ethylenically unsaturated monomer (c). Polymer (I), in a solid aggregation state, produced by recating at least one monomer (a), i.e. an unsaturated mono- or di-carboxylic acid, or analog; at least one monomer (b), i.e. an unsaturated ester or amide of a polymer (B) with one end blocked by a group that is not reactive under normal conditions and, at the other end, a hydroxy or amino group, optionally also an ethylenically unsaturated monomer (c). (B) has formula X-(EO)x-(PO)y-(BuO)z-R (B) contains less than 20wt.% total PO and BuO groups; has molecular weight120 D to 20kD, especially 250 D to 10kD, and the proportion of (B) with molecular weight below 500 D is less than 50, especially 30, mole%. x, y and x : 0-2500, with total 3 or more; X : hydroxy or NHR'; R' : 1-20C alkyl, 7-20C alkaryl or, preferably, hydrogen; EO, PO and BuO : respectively ethylene, propylene and (iso)butylene residues . Independent claims are also included for the following: (1) method for preparing (I); and (2) solution prepared by dissolving (I) in water.
Patent JP-2005521714-A (JP)
Title: ポリエチレングリコール等を含有するメロキシカム坐剤
IPC: A61K31/542
Filed: 2003-03-28
Abstract: 本発明は、有効成分メロキシカム又は医薬的に許容され得るそれらの塩、及び少なくとも一つの医薬的に許容され得る賦形剤から本質的になる坐剤に関する。
Patent JP-2005521982-A (JP)
Title: 光ディスク及び光ディスクの記録方法
IPC: G11B7/0037
Filed: 2003-02-27
Abstract: ＤＶＤ＋ＲＷディスクに欠陥ブロックが含まれた領域に記録する方法及びその方法によって記録された光ディスクが開示されている。   この光ディスク記録方法は、欠陥のあるＥＣＣブロックを含む領域にデータを記録する時、前記欠陥のあるＥＣＣブロックの前のＥＣＣブロックで記録を終了する段階と、前記欠陥のあるＥＣＣブロックの次のＥＣＣブロックの最後の８チャンネルビットで記録を開始する段階と、を含むことを特徴とする。   前記のような構成によって既存に規定されていない欠陥領域を含む所定領域に記録する方法を新たに提案することによって、光ディスクの記録／再生に統一を図ることができる。
Patent JP-2005522862-A (JP)
Title: 電子装置の製造方法および電子装置
IPC: H01L23/538
Filed: 2003-04-08
Abstract: 本発明は、半導体装置（１０）の製造方法に関し、これにより電気素子（１１）は、第１の材料の第１の層（５）と、第１とは異なる第２の材料の第２の層（２）とを備えるキャリアプレート（４）の上または上方に取り付けられ、第２の層は、導電性であり、第１の層（５）より厚さが小さく、少なくとも第１の層（５）に達する空洞（６）が形成されている。素子（１１）は、キャリアプレート（４）の各部分（２）に、第１の接続領域で、電気的に接続され、素子（１１）の周囲、および空洞（６）内にカプセル封じが設けられる。次いで、キャリアプレート（４）の第１の層（５）の大部分が取り除かれるため、空洞（６）に達し、これにより、第２の接続領域（２）が、キャリアプレート（４）の残りの部分から形成される。本発明によれば、カプセル封じ（３）が設けられる前に、空洞（６）に取り囲まれたキャリアプレート（４）の一部に、少なくとも１つのさらなる空洞（７）が形成され、さらなる空洞（７）は、カプセル封じの設置中に、カプセル封じ（３）の一部で、少なくとも実質的に満たされ、第２の接続領域（２）内で、その一部（２Ａ）をその残りの部分（２Ｂ）から区切り、一部（２Ａ）の最小の寸法は、各第２の接続領域（２）の残りの部分（２Ｂ）の最小の寸法よりも小さくなるように選択される。このように、一部（２Ａ）には、第２の接続領域（２）の残りの部分におけるはんだ（８Ｂ）の厚さより薄い厚さを持つ、はんだ（８Ａ）を容易に設けることができる。これは、例えば装置（１０）を表面実装する場合に、有利である。好ましくは、第１の接続領域（１）は、接続領域（２）の一部（２Ａ）に接続される。
Patent JP-2005522498-A (JP)
Title: エーテル、エステル又は酸無水物の製造方法
IPC: C07C51/02
Filed: 2003-04-14
Abstract: フィルターエレメント上に存在させた、有機若しくは酸素含有無機酸の塩又はアルコキシドから選択される第１反応物質で構成されるケーキに、無機若しくは有機酸のハロゲン化物及びハロゲン化アルキルから選択される第２反応物質で構成される溶液を貫流させて、形成される不溶性ハロゲン化塩をフィルターエレメント上に残留させると、エーテル、エステル又は酸無水物が有利に取得される。これによって、本質的に定量的方法でハロゲン化塩を容易に分離することが可能になる。
Patent JP-2006515900-A (JP)
Title: 白金電極及びその製造方法
IPC: A61N1/05
Filed: 2003-04-10
Abstract: 改良された電極、及び該電極を製造する方法であって、前記電極は、同一ジオメトリの光沢白金と比較して少なくとも５倍は表面積が増加しており、また同一表面積を有する白金黒と比較して物理的応力に対する耐性が改善されている白金のフラクタル表面コーティング［発明者らは、“白金グレイ”と称している］を有している。白金グレイの表面コーティングを電気めっきするプロセスは、光沢白金を発生させるのに必要な速度より速く且つ白金黒を発生させるのに必要な速度より遅い中庸の速度でめっきすることからなる。
Patent JP-2005532422-A (JP)
Title: 体液の分解を遅延させる吸水性ポリマー粒子、ポリマー粒子を含む複合材料およびそれらの使用
IPC: C08F2/44
Filed: 2003-04-23
Abstract: 【解決課題】  十分に長い期間維持される十分な抗菌効果を有する吸水性抗菌ポリマー粒子を提供することにある。   【解決手段】  吸水性抗菌ポリマー粒子であって、ポリマー粒子基準で１〜５００ｐｐｍの、少なくとも１×１０ −８ （モル／リットル） ｍ＋ｎ の溶解度積を有する銀塩をベースとする銀イオンと、ポリマー粒子基準で少なくとも１０重量％の、（α１）５０〜９９．９９重量％の、重合しているエチレン性不飽和酸性基含有モノマー、その塩、またはそれらの混合物と、（α２）０〜４０重量％の、（α１）と重合可能な、重合しているモノエチレン性不飽和モノマーと、（α３）０．０１〜５重量％、好ましくは０．１〜３重量％の１種以上の架橋剤と、（α４）０〜３０重量％の水溶性ポリマーと、（α５）０〜２０重量％の１種以上の助剤と、からなる吸水性ポリマー（（α１）〜（α５）の重量の合計は１００重量％）と、任意の添加剤と、を含み、銀塩をベースとする銀イオンの濃度が０．０１ｐｐｍ未満の部分が、吸水性抗菌ポリマー粒子の９０体積％以下であり、吸水性抗菌ポリマー粒子が、ポリマー粒子の重量基準で０．０１〜３０重量％の後架橋剤によって後架橋されていることを特徴とする吸水性抗菌ポリマー粒子。
Patent JP-2004234646-A (JP)
Title: Content relevant information providing device, content relevant information providing method, content relevant information providing system, portable terminal and information processing system
Inventor: SATO HIROSHI
IPC: H04N21/858
Filed: 2004-01-06
Abstract: <P>PROBLEM TO BE SOLVED: To provide a content relevant information providing device and method for directly transmitting content relevant information for a content displayed on a display device to a terminal such as a cellular phone and to provide a system for integrating information from the content relevant information providing device or other information sources to comprehensively information-process a social, economic, or market phenomenon.  <P>SOLUTION: This device comprises a display device 1 such as a video display on a wall surface, a kiosk or POS set in a store or a TV receiver set in a home, and a control device 6 and transformation module 68 for synchronizing or associating content relevant information, such as an URL, telephone number, or commodity information, related to content data 5 such as an image and sound to be displayed thereon with an image displayed on the display device. The content relevant information 7 transformed into a transmittable and receivable format by the synchronization or association is transmitted to a portable terminal 9 such as cellular phone by use of a transmitting and receiving interface 8. Information from the content relevant information providing device or other information sources is integrated, and information-processed in the information processing system 3500.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2005198676-A (JP)
Title: Antiviral mask
Inventor: KITAGAWA YOSHIYUKI
IPC: A62B18/02
Filed: 2004-01-13
Abstract: <P>PROBLEM TO BE SOLVED: To provide a colorless and odorless antiviral mask excellent in safety.  <P>SOLUTION: In the antiviral mask, citric acid is contained in at least one layer of a filter material, the mixture of the citric acid and water dispersible resin emulsion is used, and it is fixed to a fibrous base material by drying and solidifying it. In the mask which captures viruses, it is made possible to suppress virus infection and promptly inactivate the viruses at the time of recycling and abandonment.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005198691-A (JP)
Title: Oxygen enricher
Inventor: YOSHIDA TOSHIYUKI
IPC: A61M16/10
Filed: 2004-01-13
Abstract: <P>PROBLEM TO BE SOLVED: To provide an oxygen enricher which supplies oxygen-enriched air to a user and can be used anywhere outdoors or indoors.  <P>SOLUTION: The oxygen enricher is provided with: a main body 1 incorporating an oxygen enriching means 15 and a pump means 5 for supplying the oxygen-enriched air obtained there to a prescribed part; a blowing means (not shown in the figure) for sucking ambient air into the main body 1, supplying it to the oxygen enriching means 15 and then discharging it to the outside of the main body 1; a control means 31 for controlling the pump means 5 and the blowing means; and a secondary battery 32 to serve as the power source of the pump means 15, the blowing means and the control means 31. The control means 31 is disposed on one surface of the oxygen enriching means 15 and the secondary battery 32 is disposed on the other surface. The oxygen enricher can be used by means of the secondary battery 32 even outdoors or in a vehicle or the like where no AC power source is available. Since the secondary battery 32 is disposed at one part and the control means 31 at the other part of the oxygen enriching means 15 to be cooled by the ambient air taken in by the blowing means, they are efficiently cooled, the degradation of the secondary battery 32 in an early stage is prevented, and the reliability of the control means 31 is improved as well.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005200677-A (JP)
Title: Method of producing metal particulate
Inventor: TOMARU YUICHI
IPC: G11B5/842
Filed: 2004-01-13
Abstract: <P>PROBLEM TO BE SOLVED: To facilitate the mass production of metal particulates in an nanoorder.  <P>SOLUTION: A substrate 1 composed of an aluminum layer 4 is anodized to form an alumina layer 5 on the surface layer of the substrate 1. By the anodization, the surface of the alumina layer 5 has a structure where a plurality of micropores 6 are formed, and the bottom side of the alumina layer 5 has a structure where the alumina layer 5 is projected (projecting part 7) to the bottom direction of each micropore. Next, the alumina layer is removed from the anodized substrate 2 to obtain a porous structure 3 with a surface structure where a recessed part 8 corresponding to each projecting part 7 is formed. Metal is filled into each recessed part 8 of the porous structure 3 so as to remain only in the recessed part to produce metal particulates.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005203524-A (JP)
Title: Component supplying apparatus
Inventor: OYAMA KAZUYOSHI
IPC: H05K13/02
Filed: 2004-01-15
Abstract: <P>PROBLEM TO BE SOLVED: To easily load an accommodation tape into a component supplying apparatus and also shorten the time required for the loading.  <P>SOLUTION: An accommodation tape reel is removed from a unit frame 21 and a component supplying unit 6 which is no longer accommodating the components is removed from a unit base 19 and is then moved on the working board. Engagement between an engaging body and the engaging hole 23E of a suppressor 23 is canceled, and an accommodating tape C having no components is removed from the component supply unit 6. The accommodation tape C is fed by a certain degree from the accommodating tape reel accommodating a new accommodation tape C, and the relevant new tape C is loaded to the component supply unit 6 which is laid on the working board. In this case, the accommodation tape C is loaded to the component accommodating unit 6 via an aperture 65 for loading communicated with the tape path 64 from the side of the component supplying unit 6 under the condition that the suppressor 23 as a peeling fulcrum of the cover tape Ca of the accommodation tape C is rotated upward using an axle 23C as the fulcrum.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005203530-A (JP)
Title: Production method of electrode foil for aluminium electrolytic capacitor
Inventor: YOSHIMURA MITSUHISA
IPC: H01G9/00
Filed: 2004-01-15
Abstract: <P>PROBLEM TO BE SOLVED: To provide a production method of an electrode foil for aluminium electrolytic capacitor in which mechanical strength as well as capacitance of the electrode foil is enhanced by enhancing pit density and uniformizing the pit length.  <P>SOLUTION: In the production method of an electrode foil for aluminium electrolytic capacitor comprising a prestage etching process and post-stage etching process, the prestage etching step includes a first prestage etching process and a following second prestage etching process. In the first prestage etching process and the second prestage etching process, a maximum current density is set at the start of current application, a current is applied such that the absolute value of inclination in current density is decreased gradually when the current density is decreased from the maximum current density down to 25% thereof or below, and DC etching is performed by setting conductivity of etching liquid in the first prestage etching process higher than that in the second prestage etching process.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005203606-A (JP)
Title: Electrically connecting apparatus
Inventor: HASEGAWA YOSHIE
IPC: H01R12/50
Filed: 2004-01-16
Abstract: <P>PROBLEM TO BE SOLVED: To reduce the arranging pitch of contacts of an electrically connecting apparatus, by preventing the damages of the mounting portions adjacent to each contact which are caused by the heat generated when mounting each contact.  <P>SOLUTION: The electrically connecting apparatus includes a substrate having first and second mounting-portion groups having respectively a plurality of first mounting portions and a plurality of second mounting portions. The first and second mounting portions are so disposed in a first direction as to position them alternately, and the apparatus includes first and second contact groups having respectively a plurality of first contacts and a plurality of second contacts. The first and second contacts are mounted, respectively, on the first and second mounting portions and the contacts are disposed individually in the form of a cantilever. Further, the mounted positions of the first and second contacts on the substrate are all displaced in a second direction intersecting the first direction.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005205925-A (JP)
Title: Pneumatic tire
Inventor: YAMAMOTO SHINYA
IPC: B60C15/06
Filed: 2004-01-20
Abstract: <P>PROBLEM TO BE SOLVED: To sufficiently increase the durability of a bead part and the anti-drawing characteristic of a carcass ply and further improve the forming efficiency of a carcass ply.  <P>SOLUTION: This pneumatic tire has a bead structure in which radial inner ends of a carcass ply 3 composed of a ply chord 2 extending between a pair of bead segments 1 are held between a pair of bead cores 4 in each of the bead segments 1. Inner ends of the carcass ply 3 protruded from each of the pair of bead cores 4 in a radial inner direction are formed with protrusion members 5 increasing the thickness of the carcass ply 3.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005209698-A (JP)
Title: Light-irradiation heat treatment method and light-irradiation heat treatment equipment
Inventor: KANEZAKI EMI
IPC: H01L21/265
Filed: 2004-01-20
Abstract: <P>PROBLEM TO BE SOLVED: To distribute a light-irradiation intensity in a temperature-rise process (an open-circuit control process) after the start of a light irradiation, and to reduce a stress applied to a body to be heated by decreasing the temperature dispersion of the body to be heated.  <P>SOLUTION: In a light-irradiation heat treatment method, the body to be heated 103 is supported in a vessel, and the body to be heated 103 is treated thermally by a plane-shaped light-irradiation heating means 101 formed while being opposed to one surface of the body to be heated 103. The method contains a process in which the temperature of the body to be heated 103 is elevated by irradiating the body to be heated 103 with a light having an intensity distribution in a plane shape from the means 101. The temperature distribution of the body to be heated 103 can be reduced by setting the light-irradiation intensity at a plurality of every region in the open-circuit control process after the start of the light irradiation. Accordingly, the stress is lightened, there is no distortion, contortion, warp, crack or the like, the characteristic fluctuation of a semiconductor device manufactured in the body to be heated 103 is inhibited, and a defective reliability can be reduced.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005206287-A (JP)
Title: Lifting device for vehicle maintenance
Inventor: YANAGISAWA TAKESHI
IPC: B66F7/18
Filed: 2004-01-21
Abstract: <P>PROBLEM TO BE SOLVED: To prevent a plunger from hitting a bearing sleeve because of inclination of the plunger caused by load eccentricity and generating vibrations and abnormal noises at the time of lowering the plunger in a vehicular lifting device with the plunger of a lift journaled to a cylindrical body vertically embedded on a floor surface so as to freely rise/descend.  <P>SOLUTION: An upper part bearing body 3 is installed at an upper part of the cylindrical body 1 so as to be capable of oscillating a little relatively to the cylindrical body 1. Bearing sleeves 9, 10 are provided at two upper/lower places inside the bearing body and the plunger 2 penetrates through the bearing sleeves 9, 10 so as to freely raise/lower the bearing body 3.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005121347-A (JP)
Title: Air conditioner piping unit
Inventor: JUNG IN HWA
IPC: F24F1/30
Filed: 2004-01-22
Abstract: <P>PROBLEM TO BE SOLVED: To reduce excessive vibration in air conditioner piping by changing, in looping type piping for air conditioner, the shape of piping while avoiding the formation of a looping part on the same plane, thereby enhancing the vertical (Z-directional) piping strength in the whole piping.  <P>SOLUTION: An air conditioner piping structure is improved so that the vibration can be minimized by changing the shape of piping in the looping type piping for air conditioner. In this air conditioner piping unit, one end of a first directional piping part constituted on the same plane is changed in direction to be inclined to a predetermined angle, and moved to a third plane to form a vibration reduction part, and the first directional piping part is connected to a second directional piping part formed on the other plane. A vertical piping part wound in the vertical direction is connected to a horizontal piping part while changing the direction of one end of the vertical piping part to be inclined.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005206690-A (JP)
Title: Modified epoxy resin, epoxy resin composition containing the same and its cured product
Inventor: NAKANISHI MASATAKA
IPC: H01L31/02
Filed: 2004-01-22
Abstract: <P>PROBLEM TO BE SOLVED: To provide a rubber modified epoxy resin excellent in light transmission which is useful in the application of optical materials, a rubber modified epoxy resin composition which comes to a cured product having high fracture toughness while maintaining transparency without turbidity, and its cured product.  <P>SOLUTION: The modified epoxy resin is obtained by modifying an epoxy resin (a) which is obtained by the glycidyl etherification of a phenolic resin crosslinked with an alicyclic compound having 7 or more ring constituting carbon atoms and has a light transmission at 400 nm of its 20 wt.% Carbitol acetate solution of ≥30% with a rubber. The thermosetting resin composition comprises the epoxy resin and a curing agent, and its cured product is described.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005209055-A (JP)
Title: Method for distributing load of storage
Inventor: UCHISHIBA MICHIHIRO
IPC: G06F3/06
Filed: 2004-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To enhance the performance of an entire disk system by automatically distributing the bias of the loads of a group of volumes, and equalizing the loads among the group of volumes.  <P>SOLUTION: A storage having a plurality of groups of volumes with a plurality of logic volumes that make input/output processes exclusive has a load monitoring part that monitors the bias of the loads of the logic volumes. When the load monitoring part detects the bias of the loads, the content of the logic volumes within the group of volumes of the greater load is copied into a preliminary logic volume in the group of volumes with the smaller load and a certain logic volume is moved to another logic volume within another group of logic volumes.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005209100-A (JP)
Title: Commodity information printing system, commodity information printing method, and commodity information printing program
Inventor: KOBATA KENJI
IPC: G06F17/21
Filed: 2004-01-26
Abstract: <P>PROBLEM TO BE SOLVED: To clearly distinguish commodity information having changed portions in a commodity information printing technique for preparing advertisement and price tags on commodities by printing the commodity information.  <P>SOLUTION: This commodity information printing system is so formed that a plurality of commodity information pieces are displayed by listing on a client terminal disposed on a store side. A list display part 51 comprises changed indication items 51b for indicating the presence or absence of the changed portions for the commodity information. For the commodity information having the changed portions, specified marks are given to the changed indication items 51b and displayed visually. Thus, users recognizes the commodity information having the changed portions clearly distinguished from the other commodity information.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005215185-A (JP)
Title: Liquid crystal display device and method for manufacturing the same
Inventor: TAKAHASHI HIROYOSHI
IPC: G02F1/1333
Filed: 2004-01-28
Abstract: <P>PROBLEM TO BE SOLVED: To efficiently carry out an operation of changing the position of an elastic conductive body to the ground region of a circuit board as regards a liquid crystal display device and a method for manufacturing the same.  <P>SOLUTION: The liquid crystal display device comprises a supporting member, a liquid crystal panel disposed on the supporting member, the circuit board disposed on the supporting member in parallel with the liquid crystal panel, a metallic cover 20 which covers at least a part of the liquid crystal panel and the circuit board, a metallic member 28 attachably and detachably mounted on the metallic cover, and the elastic conductive body 30 mounted on the metallic member so as to be in contact with the ground region of the circuit board.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005217679-A (JP)
Title: Authentication server performing authentication of communication partner
Inventor: TAKADA OSAMU
IPC: G06F21/33
Filed: 2004-01-29
Abstract: <P>PROBLEM TO BE SOLVED: To overcome the problem that a destination terminal cannot determine whether a communication request can be accepted or not and cannot authenticate a source terminal when a request of secure communication is received from the source terminal, and a problem that the source terminal cannot determine whether a destination terminal is a correct connection partner or not when the source terminal performs secure communication with the destination terminal.  <P>SOLUTION: An authentication server is placed at a site to which a source terminal belongs and the source terminal inquires accessibility to the authentication server at the site to which the source terminal belongs. An authentication server is placed at a site to which a destination terminal belongs and the source terminal inquires accessibility to the authentication server at the site to which the destination terminal belongs.  <P>COPYRIGHT: (C)2005,JPO&NCIPI