baber/WOPTO huggingface dataset:
Patent JP-2003196628-A (JP)
Title: Method and device for manufacturing mask program rom, computer program corresponding thereto, and computer readable recording medium
Inventor: MUELLER DETLEF
IPC: G06F21/62
Filed: 2002-12-19
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing a mask program ROM optimizing a protection resisting against an attack of a hacker and to provide a computer program corresponding thereto and a computer readable recording medium.  <P>SOLUTION: An encryption is executed in a smart card controller for the protection resisting to a non-approval reading. When mutually different keys are used for respective chips, an optimal protection is provided. It is because that if a cipher of a single device is successfully interpreted, the other devices are all protected. In a manufacturing process, a plurality of systems are simultaneously presented on a physical mask. All the systems on the physical ROM mask include same ROM code and a same key so far. If an individual key is calculated relative to each individual system in the manufacturing of the ROM mask, products having mutually different keys are provided despite of the same (logistic) ROM code. This constitution can improve the effect of the protection of the ROM encryption.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2004200540-A (JP)
Title: Semiconductor device
Inventor: MURAOKA HIROKI
IPC: H01L29/08
Filed: 2002-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a semiconductor device which has a structure suitable for achieving high breakdown resistance level.  <P>SOLUTION: In the semiconductor device, having a plurality of striped trench lines 25 which are separately arranged in parallel mutually in each adjacent cell region E1, E2 in a semiconductor layer and extending in the direction of the other cell region from one cell region, gate insulating films 19 formed in the trench lines 25 and gate electrodes 20 embedded in the trench lines 25 via the gate insulating films, with both one part of the end of each trench line 25, which are near on the other cell region and adjacent each other in each cell region, being connected via a connection part 28, and with the other ends being left open. At least one connection part 28 of one cell region and one open part 30 of the other cell region are opposed to each other.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004205057-A (JP)
Title: Plate type heat exchanger
Inventor: SHINNAGA HIDETAKA
IPC: F28F3/04
Filed: 2002-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To increase the overall heat radiating performance by uniformly flowing internal fluid in the parts of inner fins in a plate type heat exchanger having the inner fins.  <P>SOLUTION: Corrugated surfaces 5 and 6 formed with corrugation tilted relative to a lateral direction and crossed each other are disposed near the access ports of a first plate 3 and a second plate 4 having access ports 1 and 2 disposed both ends parts thereof in the longitudinal direction. Flat surfaces 7 are formed in an intermediate part between the first plate 3 and the second plate 4, and inner fins 9 are disposed between the flat surfaces 7.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004206304-A (JP)
Title: Learning system, learning management server, image distribution server, and learning management program
Inventor: YAMAMOTO TAKEHIRO
IPC: G06Q50/10
Filed: 2002-12-24
Abstract: <P>PROBLEM TO BE SOLVED: To enable the reduction of a cost for setting or maintenance of equipment or the like in an organization when educational material data including an image part, and to enable the confirmation of the learning history of an object person of learning.  <P>SOLUTION: The learning management server 30 extract educational material text information from an educational material database 36, and transmits it to a user terminal 10 through a LAN 90. The learning management server 30 transmits, when it is determined that an image part is included in the educational material data, an image file address acquired from an image delivery server 70 to the user terminal 10 through the LAN 90. THe image delivery server 70 starts, on receipt of image starting information from the user terminal 10, to deliver educational material image information to the user terminal 10 through a communication network. When the delivery to the user terminal 20 is ended, the image delivery server 70 transmits audio-visual information to the learning management server 30 through the communication network.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004205150-A (JP)
Title: Heat accumulator and activating method for electrode thereof
Inventor: SAIDA KENJI
IPC: F28D20/00
Filed: 2002-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a heat accumulator not containing nitric acid in a heat storage material and having repeated stability in starting solidification formed by using the heat storage material containing, as a main material, sodium acetate trihydrobase, comprising at least a pair of electrodes coming into contact with the heat storage material, and at least one of which is a silver electrode and a method for activating the electrodes of the heat accumulator allowing the heat accumulator to operate with high repeated stability in starting solidification.  <P>SOLUTION: This heat accumulator is formed by using the heat storage material using, as a main material, sodium acetate trihydrobase, and containing sodium thiosulfate, comprises at least the pair of electrodes coming into contact with the heat storage material, and at least one of which is the silver electrode. In this heat accumulator, at least one of the silver electrode coming into contact with the heat storage material in molten state is energized, and the heat storage material in the state of the silver electrode coming into contact with the heat storage material is solidified for an activating treatment.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2003333737-A (JP)
Title: Perforated pipe assembly
Inventor: JO MEIU
IPC: H02G9/08
Filed: 2002-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a perforated pipe assembly which can be lightened by improving perforated pipes and also can save the cost by saving the materials thereby making the working convenient.  <P>SOLUTION: This perforated pipe assembly 30, which is provided within a communication channel so as to accommodate cables separately, is equipped with perforated pipes 20 each of which is a cylindrical pipe with its front 22 blocked and includes many cable storage holes 24 for accommodating the above cables at the front 22, and many perforated pipes stated above are stacked longitudinally.  <P>COPYRIGHT: (C)2004,JPO
Patent JP-2004209714-A (JP)
Title: Glossy film
Inventor: TAKAHASHI TOMOTSUGU
IPC: B32B15/08
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a glossy film capable of being effectively utilized widely as a base material or the like of a delivery slip not leaving the residue of a repapering preventing label and an indelible seal, a concealing seal for a postcard or a passbook, an application seal and a coupon because the glossy film requires no special processing for starting peeling and can be peeled by small force.  <P>SOLUTION: The glossy film is characterized by providing a glossy layer (C) on at least one surface of a film (I) which is formed by laminating an easy peel layer (B) with a peel strength of 5-150 g/cm width on at least one surface of a base layer (A) comprising a thermoplastic resin.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004209809-A (JP)
Title: Method for producing steel pipe built-in compressed wood
Inventor: GOTOU HISAYOSHI
IPC: E01F15/02
Filed: 2002-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To solve such problems that the merits of wood are developed because reinforced wood wherein wood and a reinforcing material such as a steel pipe or the like are combined but no attention is paid on corrosion resistance or the like, problems are left in a mountainous district of severe weather conditions or the like as the protective fence, this reinforced wood is limited to one-sided improvement because of the mere improvement of the protective fence and the reinforced wood is not constituted in order to achieve the function of a soundproof wall or the avoidance of an offensive smell.  <P>SOLUTION: The protective fence comprising the steel pipe built-in compressed wood comprises the compressed wood having the steel pipe with screw parts, a connection material for two steel pipe built-in compressed woods, locking elements threaded with the screw parts for fixing the steel pipe built-in compressed wood and the connection material, brackets provided between the fixed steel pipe built-in compressed wood, the connection material and the support, and the locking parts for the brackets and the support. The protective fence using timber from thinning and excellent in strength, corrosion resistance or the like can be provided. The fence is usable under the rain-exposed severe installation conditions and the severe weather conditions of the mountainous district, the cold district or the like.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2003536194-A (JP)
Title: 記録媒体のようなディスクに対するファイルの即時書き込み又は読み取り方法
IPC: G11B20/10
Filed: 2001-05-14
Abstract: (57)【要約】
記録媒体のような取り外し可能であり再書き込み可能なディスクに、デジタル情報信号を記録する方法であって、この方法は、ディスクの論理領域にユーザデータを記録し、記録／再生装置からディスクを取り外す前に、あらかじめ規定された媒体フォーマットデータを含むリードイン及びリードアウト領域によりディスクを終了化することを含む。ユーザデータの記録以外の用途のための論理領域内の汎用領域が予約される。上記の用途は例えば欠陥管理でありうる。更にこの方法は、ユーザデータの要求がなされるときはいつも、あらかじめ規定されたスプライスポイントでリードイン領域又はリードアウト領域の記録に割り込むことを含む。
Patent JP-2004517804-A (JP)
IPC: A61K47/48
Filed: 2001-06-28
Abstract: This invention relates to a method for treating and preventing hypertension by administering a therapeutically effective amount of an agent capable of reducing uric acid levels in a patient in need of such treatment. Additionally, the scope of the invention includes a method of treating coronary heart disease by administering a therapeutically effective amount of an agent capable of reducing uric acid levels in a patient in need of such treatment.
Patent JP-2004503197-A (JP)
Title: Ｐｆｍ／ｐｗｍモード用多出力ｄｃ／ｄｃコンバータ
IPC: H02M3/158
Filed: 2001-06-27
Abstract: 誘導エネルギー蓄積手段、切換え手段、制御手段を備えるＤＣ／ＤＣコンバータであって、前記制御手段は、パルス幅変調（ＰＷＭ）モードおよびパルス周波数変調（ＰＦＭ）モードの切換サイクルにおける前記エネルギー蓄積手段から前記ＤＣ／ＤＣコンバータの出力へ電気的エネルギーを提供するために前記切換え手段を選択的に動作させるように構成されている。前記制御手段は、多出力の各出力にために複数の個別切換えサイクルのシーケンスを提供することにより、前記ＤＣ／ＤＣコンバータの多出力を制御するために構成され、ＰＷＭモードにおける主要な出力はシーケンス内で供給されるべき全エネルギー量を決定すると共に、ＰＷＭモードにおける１つの出力の切換サイクルの数が前記出力に供給されるべき全エネルギー量の一部分によって決定される。
Patent JP-2004512192-A (JP)
Title: 感熱性平板印刷プレートの印刷機上（オン・プレス）現像
IPC: G03F7/00
Filed: 2001-08-31
Abstract: 【解決手段】本発明は、赤外線の照射による硬化又は可溶化が可能な感熱性層を基板上に有する平板印刷プレートのインキ及び／又は湿し水によるオン・プレス現像に関する。前記プレートは、赤外線により所望のイメージに露光され、プレートシリンダを回転させることによってインキ及び／又は湿し水によるオン・プレス現像がされ、インキ及び／又は湿し水のローラーに係合される。現像されたプレートは、画像を受容媒体に直接印刷する。所望のイメージの露光は、印刷機とは別に行うか、平板印刷機のプレートシリンダに載置されたプレートにより行うことができる。
Patent JP-2004514123-A (JP)
Title: 無線リンクを用いた動的物理過程のデータを取得する方法とそのための装置
Inventor: REINDL LEONHARD
IPC: B60C23/06
Filed: 2001-11-19
Abstract: 【課題】無線リンクを用いて動的物理過程のデータを取得することに関する。 【解決手段】トランスポンダーアンテナ（１７）は、トランスポンダーアンテナ（１７）の共振周波数の励起電磁波によって励起され、取得しようとするデータに依存した電気インピーダンスを持つセンサー（１６）によって変調された後方散乱センサー電磁波を受信し、解析する。センサー（１６）は、トランスポンダーアンテナ（１７）に直接接続されており、その結果センサーは、取得しようとするデータのあらゆる変動に応じて、トランスポンダーアンテナ（１７）の電気インピーダンスを変化させることとなる。トランスポンダーアンテナ（１７）によって後方散乱された電磁波は、トランスポンダーアンテナ（１７）が励起電磁波によって励起されると同時に、センサー電磁波として受信される。
Patent JP-2004520573-A (JP)
Title: 流量計
IPC: G01F1/66
Filed: 2001-11-19
Abstract: 本発明の目的は、計測管（１）においてらせん状超音波を発信する超音波流量計であって、簡素化された構造を有するものを提供することである。本目的のため、本発明は超音波トランスデューサ（１４；１５）の射出軸（２０；２１）を同一平面内に含めず、一の超音波トランスデューサ（１４または１５）から他の超音波トランスデューサ（１５または１４）への超音波の伝播経路（２２）は、計測管（１）の内壁（５）上に少なくとも２つの反射点を有している。本流量計に備わっている特徴には、超音波トランスデューサ（１４；１５）の射出軸（２０；２１）が同一平面に含まれないこと、および、内壁が、超音波を射出または受信する超音波トランスデューサ（１４；１５）の筐体部のための開口部を除いて、完全にフラットであることが含まれている。
Patent JP-2004515703-A (JP)
Title: 冷却空気をガスタービンに供給するためのシステム
IPC: F02C1/00
Filed: 2001-12-05
Abstract: ガスタービンに冷却空気を供給するためのシステムにおいて、冷却空気がガスタービン内部の高圧源から取り入れられ、ラジアル加速器（１２）に運ばれ、該加速器がロータ表面の周運動の方向に空気を接線方向に加速する。冷却空気がロータの周速度まで加速された後に、該冷却空気は、ラジアル孔（１３）に流入し、該ラジアル孔（１３）を半径方向に通過する間に、接線方向の運動量を減少させられる。その後、冷却空気は対応して縮小された出口半径（１４）で中空のロータ内に放出される。ブラシシールと組み合わされた一連のラビリンスシールが、空気をラジアル孔（１３）に供給するためのチャンバを、ガスタービンのパッド＃２（１５）の周りの低圧環境から分離する。
Patent JP-2004517543-A (JP)
Title: Ｆｐｇａのアーキテクチャ
IPC: H03L7/183
Filed: 2001-12-20
Abstract: 書き換え可能ゲートアレイ（１００）は、プログラム可能な相互接続構造（１０４）、及び複数のロジックセル（１０２）を有する。ロジックセルは各々複数の組み合わせ論理回路（１１０ａ、１１０ｂ）を有し、それらはプログラム可能相互接続構造との直接接続及びレジスタとして機能するＤ型フリップフロップのような複数の順次論理素子（１６２、１６４）を有する。組み合わせ論理回路が順次論理素子の入力端子と接続されても良いのは勿論のこと、プログラム可能相互接続構造と直接に接続されても良い。結果として、ロジックセル（１０２）は、プログラム可能な相互接続構造（１０４）との組み合わせ接続と、およびレジスタされた接続との双方を含む。さらに、順次素子の一つが、プログラム可能相互接続構造よりの専用入力を、選択的に受け取っても良い。ロジックセルの出力リード線は、保護トランジスタを有するドライバを介してプログラム可能相互接続構造へと接続される。保護トランジスタのゲートは、ドライバ関連の第二の電荷ポンプは勿論のこと、複数のドライバと共有される第一電荷ポンプへと接続される。
Patent JP-2004516849-A (JP)
IPC: C12N9/88
Filed: 2002-01-08
Abstract: The present invention provides for microorganisms capable of tolerating acetonitrile concentrations of at least 3 M, enzyme extracts obtainable from these microorganisms, a nitrile hydratase obtainable from these microorganisms, a method for preparing amides using these microorganisms, the enzyme extracts or the nitrile hydratase obtainable therefrom, and a method for removing acetonitrile from solutions using these microorganisms, the enzyme extracts or the nitrile hydratase obtainable therefrom.
Patent JP-2004530040-A (JP)
IPC: C23F3/00
Filed: 2002-02-07
Abstract: The invention described herein discloses a chemical mechanical machining and surface finishing process. A conversion coating is formed on the surface of a workpiece and is removed via relative motion with a tool, thereby exposing the workpiece to further reaction with the active chemistry. Low mechanical forces are used such that the plastic deformation, shear strength, tensile strength and/or thermal degradation temperature of the workpiece are not exceeded. Since the chemical mechanical machining and surface finishing process requires little force and/or speed of contact to remove the conversion coating, the equipment's mass, complexity and cost can be significantly reduced, while simultaneously increasing machining precision and accuracy. The present invention lends itself to a very controlled rate of metal removal, and can simply surface finish the workpiece, or if desired, can surface finish the workpiece simultaneously with the shaping and/or sizing process.
Patent JP-2004538433-A (JP)
Title: 冷蔵家具ユニット用に特化したプロフィル
IPC: F25D23/08
Filed: 2002-01-23
Abstract: 本発明は、特に冷蔵家具ユニット用の改良されたプロフィルに関連する。そのものは、ドアと家具との間を密封しかつ様々な構成要素の自動組立を可能にできるベローズ型密封材を有する型式のものである。
Patent JP-2004531232-A (JP)
Title: 高められた転写および複製能力をもつインフルエンザウイルス
IPC: C12N9/12
Filed: 2002-02-07
Abstract: 本発明は、改変されたＲＮＡポリメラーゼをコードするＲＮＡ配列を含んで成るヒトインフルエンザウイルス、それらの製造方法、前記ヒトインフルエンザウイルスを含んで成る製薬学的組成物、および哺乳動物細胞への遺伝子導入、樹状細胞のような抗原提示細胞へのエクスビボ遺伝子導入、インビボ体細胞遺伝子治療もしくはインビボワクチン接種の目的上のそれらの使用を提供する。本発明はまた、ウマ、ブタ（ｐｏｒｃｉｎｅ）（ブタ（ｓｗｉｎｅ））インフルエンザウイルスを包含する他の非トリインフルエンザウイルスにも関する。
Patent JP-2004523237-A (JP)
IPC: A23K10/12
Filed: 2002-02-20
Abstract: The invention relates to an improved method for producing D-pantothenic acid and/or the salts thereof and to the use thereof as an additive for animal feed.
Patent JP-2004525715-A (JP)
IPC: G06T19/20
Filed: 2002-02-21
Abstract: An image processing system in which sets of image elements having display values outside of a target range B of display values are each respectively morphologically dilated. The intersection between the morphologically dilated sets of image elements is then identified and those image elements within the intersecting region are removed from the set of image elements having the target range B of display values. This removes image elements incorrectly appearing to have display values corresponding to the target range B of display values due to aliasing effects between regions of image elements having display values either side of the target range B of image values. The imaging may be two-dimensional or three-dimensional imaging. The morphological dilatation is preferably performed with a quasi-circular or a quasi-spherical structuring element having a radius of between two and three voxels.
Patent JP-2005515751-A (JP)
Title: Ｎｋｄタンパク質のヒトホモログおよび非ヒト霊長類ホモログ、ならびにそれをコードする核酸配列、ならびにこれらの使用
IPC: C07K19/00
Filed: 2001-11-27
Abstract: Ｗｎｔシグナル伝達に関与する新規タンパク質および対応するＤＮＡを教示する。このタンパク質の発現を標的化する抗体、アンチセンス、およびリボザイムもまた、提供する。このタンパク質の発現を検出および調節する工程を包含する治療方法および検出方法が、さらに提供される。より詳細には、本発明は、Ｄｉｓｈｅｖｅｌｌｅｄタンパク質（Ｄｓｈ）に関連し、Ｗｎｔシグナル伝達に関係する新規のヒトまたは非ヒト霊長類Ｎｋｄタンパク質を提供する。
Patent JP-2004210973-A (JP)
Title: Polymer solution for (meth)acrylic adhesive and method for producing the same, (meth)acrylic adhesive and (meth)acrylic adhesive tape
Inventor: YAKURA KAZUYUKI
IPC: C09J133/00
Filed: 2003-01-06
Abstract: <P>PROBLEM TO BE SOLVED: To provide a polymer solution for (meth)acrylic adhesive excellent in adhesive characteristics and capable of saving a solvent (amount used) and a method for producing the polymer solution and to provide a (meth)acrylic adhesive and a (meth)acrylic adhesive tape.  <P>SOLUTION: The polymer solution for (meth)acrylic adhesive comprises a (meth)acrylic polymer and an organic solvent and has 300,000-500,000 weight average molecular weight of the (meth)acrylic polymer, and inertial radius of a (meth)acrylic polymer measured according to a multi-angle light scattering method by using the polymer solution for (meth)acrylic adhesive is ≤25 nm.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004211465-A (JP)
Title: Eaves gutter
Inventor: HATA HIDEAKI
IPC: E04D13/064
Filed: 2003-01-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide an eaves gutter capable of preventing rainwater falling on an upper inclined part, from flowing down to a lower vertical part and leaving a flow-down mark to become unsightly.  <P>SOLUTION: In this eaves gutter, the upper part outer surface of an outer side piece 1 is formed as an upper inclined part 11 positioned inward toward the upper side, and the lower part outer surface of the upper inclined part 11 of the side piece 1 is formed as the lower vertical part 12 vertical or positioned inward toward the lower side. A draining part 4 for draining so that water flowing down the upper inclined part 11 does not flow down to the lower vertical part 12 is provided at a boundary between the upper inclined part 11 and the lower vertical part 12.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004215125-A (JP)
Title: Home electric appliance adaptable to network
Inventor: OHIRA AKIYOSHI
IPC: G06Q50/00
Filed: 2003-01-08
Abstract: <P>PROBLEM TO BE SOLVED: To enable a user to request remote failure diagnosis to a service company and to simultaneously transfer the operation data of a home electric appliance to the service company by a remote controller and to easily retrieve the location, etc., of the service company by using the remote controller even when a dwelling of the user is changed in the remote failure diagnosis and network service accompanying it.  <P>SOLUTION: The failure diagnosis is started by depressing the key exclusive for the remote controller for performing the failure diagnosis when the user feels abnormality of the home electric appliance. Namely, the home electric appliance has a function of taking out a necessary part of the operation data of the home electric appliance and transferring the part to the service company with time when a diagnostic key is depressed. The appliance is also provided with a function of displaying the question items required for confirmation of usage to the user by the diagnostic key. In addition, the remote controller is provided with an input key for inputting zip codes so that the location and a person in charge of the service company are retrieved at any time and a retrieved result is transmitted from the service company.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004221136-A (JP)
Title: Resist pattern forming method and manufacturing method of semiconductor device using the same
Inventor: MITSUYOSHI YASURO
IPC: G03F7/40
Filed: 2003-01-09
Abstract: <P>PROBLEM TO BE SOLVED: To provide a resist pattern forming method with no inclination or pattern fall, along with a method of manufacturing a semiconductor device using the same.  <P>SOLUTION: When a pattern 13 which is at least a part of a resist pattern tilts beyond vertical direction relative to a substrate to be worked, a pattern side wall 13a which is on the side opposite to a pattern side wall 13b on the side of tilted pattern 13 is irradiated with electron ray 14, so that the pattern 13 is set almost vertical to the substrate. The electron ray 14 is preferred to irradiate near the interface between the pattern 13 and the substrate. Thus, the tilted resist pattern can be corrected to form a resist pattern of good shape.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004218211-A (JP)
Title: Float type screen
Inventor: SUENAGA IKUJI
IPC: E03F5/14
Filed: 2003-01-10
Abstract: <P>PROBLEM TO BE SOLVED: To provide a float type screen in which an initial cost is held down at a low value by simplifying a structure while a running cost can be reduced by making the power of a motor or the like unnecessary.  <P>SOLUTION: The float type screen is installed to an overflow weir (an overflowing section) 23 mounted on a boundary section between a main stream (one water way) 20 and both an effluent water way (the other water way) 21 and an impervious collecting water way 22, and an overflow on the weir 23 of impurities in the sewage of the main stream 20 and a flowing-down into waters for the public sociaty at the destination of an effluence from the water way 21 are prevented. The screen has a screen body 24 for supplementing the impurities and a float 25 mounted at the free end section of the screen body 24. The screen body 24 is secured rotatably at the upper end section of the weir 23 by fitting a cylindrical body 26 at a base end section and rotatably inserting a supprting shaft 27 on the weir 23 side to the cylindrical body 26.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2004217457-A (JP)
Title: Method for producing optical fiber preform
Inventor: SAITO HIROFUMI
IPC: C03B37/012
Filed: 2003-01-14
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for producing an optical fiber preform in a high yield without damaging its core in its production process.  <P>SOLUTION: An optical fiber preform of glass in a cylindrical shape comprising a clad section and a core section enclosed by the clad section is prepared; then, at least one end of the preform is fusion-cut to give a fusion-cut preform; a dummy glass rod is fusion-bonded to the end; and the part of the dummy glass rod is mechanically worked, thus giving an optical fiber preform of which at least one end is flat-shaped substantially vertically to the longitudinal direction of the preform. Otherwise, the fusion-cut preform and a dummy glass rod having a substantially flat-shaped end are fusion-bonded to each other to give an optical fiber preform of which at least one end is flat-shaped substantially vertically to the longitudinal direction of the preform.  <P>COPYRIGHT: (C)2004,JPO&NCIPI