JP3103325B2 - File clip holder for apical hole position detection - Google Patents
File clip holder for apical hole position detectionInfo
- Publication number
- JP3103325B2 JP3103325B2 JP09198730A JP19873097A JP3103325B2 JP 3103325 B2 JP3103325 B2 JP 3103325B2 JP 09198730 A JP09198730 A JP 09198730A JP 19873097 A JP19873097 A JP 19873097A JP 3103325 B2 JP3103325 B2 JP 3103325B2
- Authority
- JP
- Japan
- Prior art keywords
- hole position
- file
- clip holder
- electrode wire
- apical
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、歯科治療におい
て、根尖孔位置（根管長）を電気的に測定するための根
尖孔位置検出用ファイルクリップホルダーに関し、より
詳細には、根尖孔位置を測定するために、根尖孔位置検
出針（ファイル）に接触されて、該根尖孔位置検出針の
先端が根尖位置に達したことを電気的に検出するための
根尖孔位置検出用ファイルクリップホルダーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apical hole position detecting file clip holder for electrically measuring an apical hole position (root canal length) in dental treatment, and more particularly to an apical hole. An apical hole for electrically detecting that the tip of the apical hole position detecting needle has reached the apical position by being brought into contact with an apical hole position detecting needle (file) to measure the hole position. The present invention relates to a position detection file clip holder.
【０００２】[0002]
【従来の技術】歯内療法における根管治療の困難さは、
根尖周囲組織を傷つけずに根尖まで確実に根管の拡大，
清掃を行い、これを緊密に充填する点にある。治療中に
根尖孔位置を越えてリーマ，ファイル，ブローチ，根管
充填材料等で根尖充填材料等根尖歯周組織を刺激するこ
とは好ましくなく、このため、根尖歯周組織の刺激を恐
れて、器具の挿入が不十分となったり、根尖部根管に清
掃消毒されない空隙を残すことは予後を不良にする原因
となる。従って、根管治療を正しく行うためには、予め
根管の正確な長さを知っておく必要がある。これまで臨
床において、根管長（根尖孔位置）を知る方法として、
測定針（通常、リーマ又はファイル）を根管に挿入し、
術者の手指の感覚による方法が知られている。2. Description of the Related Art The difficulty of endodontic treatment in endodontics is
Enlarge the root canal to the apex without damaging the periapical tissue,
The point is to clean and fill it tightly. It is not preferable to stimulate the apical periodontal tissue such as the apical filling material with the reamer, file, broach, root canal filling material, etc. beyond the apical hole position during the treatment. Due to fear of inadequate insertion of instruments or leaving an apical root canal that cannot be cleaned and disinfected can cause a poor prognosis. Therefore, in order to perform root canal treatment correctly, it is necessary to know the exact length of the root canal in advance. Until now, in clinical practice, as a method to know the root canal length (apical foramen position),
Insert a measuring needle (usually a reamer or file) into the root canal,
A method based on the sense of the operator's finger is known.
【０００３】しかし、この方法によると、上顎切歯，犬
歯，下顎小臼歯等のように単純で太い根管で、しかも、
根尖が完成して、根尖狭窄部が明らかに触知できる症例
ではほぼ触知できるが、根管が細く、根尖未完成歯や彎
曲した根管では熟練者でも確認が難しいという問題点が
ある。そのために、根管長を電気的に測定するものとし
て、特開昭６０−１７４１４４号公報に記載されている
ように、根管内に、リーマを測定針として挿入し、口腔
粘膜に当接した片電極との間に、例えば、１ＫＨｚ2と
５ＫＨｚ2の２つの周波数の交流電圧を加え、根管長を
検出するものも提案されている。However, according to this method, a simple and thick root canal such as an upper incisor, a canine tooth, a lower premolar, etc.
In cases where the apex is completed and the apical stenosis can be clearly palpated, it can be almost palpated, but the root canal is thin, and it is difficult to confirm even inexperienced apical teeth and curved root canals There is. For this purpose, as described in JP-A-60-174144, a reamer was inserted into the root canal as a measuring needle to electrically measure the length of the root canal, and was brought into contact with the oral mucosa. between the strip electrodes, for example, the two AC voltage of a frequency of 1 KHz 2 and 5 KHz 2 addition, has also been proposed to detect the root canal.
【０００４】図２は、手用のリーマ又はファイルを用い
て根管長を電気的に測定する一例を説明するための図
で、図中、２０はリーマ又はファイル等をクリップする
先端部を有するファイルクリップホルダー、３０はリー
マ又はファイル、４０は歯、４１は根管、４２は歯肉
で、周知のように、リーマ又はファイル３０は、導電性
の針部材３１，刃部３２，ラバーストップ３３，把持部
３４等から成り、該手用のリーマ又はファイル３０を用
いて根管長を測定する場合、ラバーストッパー３３と把
握部３４の間をファイルクリップホルダー２０の測定用
電極２１で保持し、リーマ又はファイル３０を一方の電
極とする電気的根管長測定の際の一方の電極の信号取り
付け部としている。この電気的な根管長の測定により、
根管長が検出できたら、ラバーストッパー３３を移動さ
せて、根管長をリーマに移して読んでいた。FIG. 2 is a view for explaining an example of electrically measuring the root canal length using a hand reamer or file. In the figure, reference numeral 20 denotes a tip having a tip for clipping the reamer or file. File clip holder, 30 is a reamer or file, 40 is a tooth, 41 is a root canal, 42 is a gum, and as is well known, the reamer or file 30 is made of a conductive needle member 31, a blade portion 32, a rubber stop 33, When the root canal length is measured using the hand reamer or file 30, the gap between the rubber stopper 33 and the grasping part 34 is held by the measurement electrode 21 of the file clip holder 20, and the reamer is used. Alternatively, the file 30 is used as a signal attachment portion for one electrode when measuring the electrical root canal length using the one electrode. By measuring this electrical root canal length,
When the root canal length was detected, the rubber stopper 33 was moved, and the root canal length was transferred to the reamer for reading.
【０００５】図３は、図２に示したファイルクリップホ
ルダー２０の詳細を説明するための断面図で、２１は測
定電極線で、この測定電極線２１は、図示のように、絶
縁性の保護管２２内に挿通され、その端部は、機械的に
は、押圧部材２３に固定され、電気的にはリード線２４
に接続され、該リード線２４を通して図示しない根管長
（根尖位置）測定器に導かれている。一方、保護管２２
の端部２２ａは大径に形成され、この大径部２２ａ内に
スプリング２５が挿入されている。従って、押圧部材２
３を矢別Ａ方向に押すと、スプリング２５が圧縮され、
測定電極線２１が矢印Ａ′方向に移動し、従って、保護
管２２の先端部２２ｂと測定電極線２１の先端のクリッ
プ２１ａとの間に測定針３１を挿入することができ、押
圧部材２３の押圧力を解除すると、測定電極線２１は、
スプリング２５の復元力によって矢印Ｂ′方向に移動
し、従って、図２に示したように、保護管２２の先端部
２２ｂと測定電極線２１との間に測定針３１を狭持する
ことができる。FIG. 3 is a cross-sectional view for explaining the details of the file clip holder 20 shown in FIG. 2. Reference numeral 21 denotes a measuring electrode wire. As shown in FIG. It is inserted into the tube 22 and its end is mechanically fixed to the pressing member 23 and electrically connected to the lead wire 24.
To the root canal length (apical position) measuring device (not shown) through the lead wire 24. On the other hand, the protective tube 22
Has a large diameter, and a spring 25 is inserted into the large diameter portion 22a. Therefore, the pressing member 2
When 3 is pushed in the direction of arrow A, the spring 25 is compressed,
The measurement electrode wire 21 moves in the direction of the arrow A ′, so that the measurement needle 31 can be inserted between the distal end portion 22 b of the protective tube 22 and the clip 21 a at the distal end of the measurement electrode wire 21. When the pressing force is released, the measurement electrode wire 21
Due to the restoring force of the spring 25, it moves in the direction of arrow B ', so that the measuring needle 31 can be held between the distal end portion 22b of the protective tube 22 and the measuring electrode wire 21, as shown in FIG. .
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記従来の根
尖孔位置（根管長）検出装置においては、ファイルクリ
ップホルダー２０が剛体で構成されているため、例え
ば、臼歯の治療の場合、術者が患者の口腔内に手を入れ
てストッパー３３を移動させる際等において、該ファイ
ルクリップホルダー２０が、術者の手の邪魔になった
り、術実の視野を妨げたりする場合があった。However, in the above-described conventional apical hole position (root canal length) detecting device, the file clip holder 20 is formed of a rigid body. When a person puts his or her hand into the patient's mouth to move the stopper 33, the file clip holder 20 may interfere with the operator's hand or obstruct the visual field of the operation.
【０００７】本発明は、上述のごとき実情に鑑みてなさ
れたもので、根尖孔位置検出用ファイルクリップホルダ
ーに弾性を持たせ、治療中、該弾性を利用してホルダー
を曲げることによって、該ホルダーが作業の邪魔になら
ず、或いは、視野の妨げにならないようにしたものであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has an apex hole position detecting file clip holder having elasticity. The holder does not obstruct the work or obstruct the field of view.
【０００８】[0008]
【課題を解決するための手段】請求項１の発明は、リー
マ又はファイル等の導電性の針部材から成る根尖孔位置
検出用測定針をクリップして前記根尖孔位置検出用測定
針の先端が根尖に達したことを電気的に検出する根尖孔
位置検出用ファイルクリップホルダーにおいて、前記フ
ァイルクリップホルダーは、先端部に前記測定針に接触
されるクリップ部を有する測定電極線と、該測定電極線
が挿通される保護チューブとから成り、前記測定電極線
及び保護チューブが可撓弾性部材で構成されていること
を特徴としたものである。According to a first aspect of the present invention, a measuring needle for detecting apical hole position which is formed of a conductive needle member such as a reamer or a file is clipped. In an apex hole position detection file clip holder that electrically detects that the tip has reached the apex, the file clip holder has a measurement electrode wire having a clip portion that is in contact with the measurement needle at the tip, A protection tube through which the measurement electrode wire is inserted, wherein the measurement electrode wire and the protection tube are made of a flexible elastic member.
【０００９】請求項２の発明は、請求項１の発明におい
て、前記測定電極線は、前記保護チューブの先端から突
出して前記測定針に接触される剛性の導電性部と、該剛
性部に続く可撓弾性の導電性部と、該可撓弾性部に続く
剛性の導電性部から成ることを特徴としたものである。According to a second aspect of the present invention, in the first aspect of the present invention, the measuring electrode wire extends from a tip of the protective tube and is in contact with the rigid needle. It comprises a flexible elastic conductive portion and a rigid conductive portion following the flexible elastic portion.
【００１０】請求項３の発明は、請求項２の発明におい
て、前記剛性部がステンレスであり、前記可撓弾性部が
ＮｉＴｉであることを特徴としたものである。In a third aspect of the present invention, in the second aspect, the rigid portion is made of stainless steel and the flexible elastic portion is made of NiTi.
【００１１】請求項４の発明は、請求項１乃至３のいず
れかの発明において、前記保護チューブは、先端側及び
把持側が金属又はウルテム等の耐熱部材で構成され、こ
れら先端側と把持側の間はシリコンチューブ又はテフロ
ンチューブ等の可撓弾性部材で構成されていることを特
徴としたものである。According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the distal end side and the gripping side are made of a heat-resistant member such as metal or Ultem. The space is formed of a flexible elastic member such as a silicon tube or a Teflon tube.
【００１２】[0012]
【発明の実施の形態】図１は、本発明による根尖孔位置
検出用ファイルクリップホルダーの実施形態を説明する
ための図で、図１（Ａ）は全体構成図、図１（Ｂ）は測
定電極線を示す図で、測定電極線１０は、図１（Ｂ）に
示すように、先端部に測定針（ファイル）に接触される
クリップ部１１を有し、図１（Ａ）に示す保護チューブ
１内に挿入され、その先端から前記クリップ部１１が突
出し、該クリップ部１１が、前述のように、測定針（フ
ァイル）に接触される。なお、保護チューブ１と測定電
極線１０の関係は、図３に示した保護管２２と測定電極
２１の関係と同様、測定電極線１０を前後動させて、ク
リップ部１１をファイルに接触，固定するようにしても
よいが、本発明は、それに限定されるものではなく、単
に、先端部にファイルに接触，固定される部材を有する
ものなら何でもよい。FIG. 1 is a view for explaining an embodiment of a file clip holder for apical hole position detection according to the present invention. FIG. 1 (A) is an overall configuration diagram, and FIG. FIG. 1B is a view showing a measurement electrode wire. As shown in FIG. 1B, the measurement electrode wire 10 has a clip portion 11 at the tip end to be brought into contact with a measurement needle (file), and is shown in FIG. The clip 11 is inserted into the protective tube 1 and protrudes from the tip thereof, and the clip 11 comes into contact with the measuring needle (file) as described above. The relationship between the protective tube 1 and the measuring electrode wire 10 is the same as the relationship between the protective tube 22 and the measuring electrode 21 shown in FIG. However, the present invention is not limited to this, and any device having a member that is in contact with and fixed to the file at the tip end may be used.
【００１３】本発明は、上述のごときファイルクリップ
ホルダーにおいて、保護チューブ１をシリコンチューブ
やテフロンなどの弾性をもった素材で構成するととも
に、測定電極線１０をクリップ部１１を含む先端側部１
０ａ及び他端のクリップ側部１０ｃをステンレス等の剛
性の導電性部材で構成し、これらの中間部１１ｂをＮｉ
Ｔｉ等で構成し、この中間部分１１ｂに弾性機能を持た
せ、図１（Ａ）に鎖線にて示すように、ファイルクリッ
プホルダーを任意所望の方向に曲げられるようにしたも
のである。According to the present invention, in the file clip holder as described above, the protective tube 1 is made of an elastic material such as a silicon tube or Teflon, and the measuring electrode wire 10 is connected to the distal end portion 1 including the clip portion 11.
0a and the clip side portion 10c at the other end are made of a rigid conductive member such as stainless steel, and these intermediate portions 11b are made of Ni.
The intermediate portion 11b is made of Ti or the like, and has an elastic function so that the file clip holder can be bent in any desired direction as shown by a chain line in FIG.
【００１４】図１（Ａ）に示す保護チューブ１において
は、先端部分１ａと把持部分１ｃには金属又はウルテム
等の耐熱素材を用い、中央の弾性部分１ｂには、シリコ
ンチューブ等を用い、これらを接着，かしめ等により接
続している。また、図１（Ｂ）に示す測定電極線１０に
おいては、クリップ部を含む先端部１１ａとリード線２
との接続部を含む１１ｃ部にはステンレス等を用い、こ
の中間の１１ｂ部にはＮｉＴｉ棒を用い、これらがかし
め，ろうづけ，溶接などにより接続されている。In the protective tube 1 shown in FIG. 1A, a heat-resistant material such as metal or Ultem is used for a tip portion 1a and a grip portion 1c, and a silicon tube or the like is used for a central elastic portion 1b. Are connected by bonding, caulking, or the like. Further, in the measurement electrode wire 10 shown in FIG. 1B, the tip portion 11a including the clip portion and the lead wire 2 are connected.
A stainless steel or the like is used for a portion 11c including a connection portion with a NiTi rod, and a NiTi rod is used for an intermediate portion 11b, and these are connected by caulking, brazing, welding, or the like.
【００１５】[0015]
【発明の効果】以上の説明から明らかなように、本発明
によると、根尖孔位置検出用（根管長測定用）ファイル
に接触，固定（クリップ）される測定用電極線（ホルダ
ー）を可撓弾性とし、任意所望の方向に曲げられるよう
にしたので、特に、臼歯治療において、ホルダーを口腔
内に挿入される術者の手の邪魔にならない位置に曲げて
使用することができ、更には、術者の視野の妨げになら
ない位置に曲げて使用することができ、非常に使い勝手
のよい根尖孔位置検出用ファイルクリップホルダーを提
供することができる。As is apparent from the above description, according to the present invention, the measuring electrode wire (holder) which is in contact with and fixed (clip) to the apical hole position detecting (root canal length measuring) file is provided. Since it is made to be flexible and can be bent in any desired direction, in particular, in the treatment of molars, the holder can be used by bending it to a position where it does not interfere with the operator's hand inserted into the oral cavity. Can be used by bending it to a position where it does not hinder the field of view of the operator, and a very convenient apex hole position detection file clip holder can be provided.
【図１】 本発明による根尖孔位置検出用ファイルクリ
ップホルダーの一例を説明するための要部分解構成図で
ある。FIG. 1 is an exploded configuration view illustrating an example of a file clip holder for apical hole position detection according to the present invention.
【図２】 従来の根管長測定用の一使用例を説明するた
めの図である。FIG. 2 is a view for explaining a conventional use example for root canal length measurement.
【図３】 図２に示した測定電極の詳細を説明するため
の図である。FIG. 3 is a diagram for explaining details of a measurement electrode shown in FIG. 2;
１…保護チューブ，１ｂ…弾性部、２…リード線，１０
…測定電極線、１０ｂ…ＮｉＴｉ合金部（弾性部）、１
１…クリップ部。DESCRIPTION OF SYMBOLS 1 ... Protection tube, 1b ... Elastic part, 2 ... Lead wire, 10
... Measurement electrode wire, 10b ... NiTi alloy part (elastic part), 1
1. Clip part.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−163597（ＪＰ，Ａ) 特開 昭50−33687（ＪＰ，Ａ) 特開 平４−336063（ＪＰ，Ａ) 特開 昭60−174144（ＪＰ，Ａ) 実開 平５−91626（ＪＰ，Ｕ) 実開 平５−21920（ＪＰ，Ｕ) 実開 平５−29512（ＪＰ，Ｕ) 実開 平４−35415（ＪＰ，Ｕ) 実開 昭59−169813（ＪＰ，Ｕ) 実開 平３−9714（ＪＰ，Ｕ) 実開 平４−32708（ＪＰ，Ｕ) 登録実用新案3031783（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) A61C 19/00 - 19/04 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-163597 (JP, A) JP-A-50-33687 (JP, A) JP-A-4-336063 (JP, A) JP-A-60-1985 174144 (JP, A) Japanese Utility Model 5-91626 (JP, U) Japanese Utility Model 52-21920 (JP, U) Japanese Utility Model 5-29512 (JP, U) Japanese Utility Model 4-35415 (JP, U) Japanese Utility Model Application Sho 59-169813 (JP, U) Japanese Utility Model Application Hei 3-9714 (JP, U) Japanese Utility Model Application Hei 4-32708 (JP, U) Registered Utility Model 3031783 (JP, U) (58) Fields investigated (Int) .Cl. 7 , DB name) A61C 19/00-19/04
Claims (4)
から成る根尖孔位置検出用測定針をクリップして前記根
尖孔位置検出用測定針の先端が根尖に達したことを電気
的に検出する根尖孔位置検出用ファイルクリップホルダ
ーにおいて、前記ファイルクリップホルダーは、先端部
に前記測定針に接触されるクリップ部を有する測定電極
線と、該測定電極線が挿通される保護チューブとから成
り、前記測定電極線及び保護チューブが可撓弾性部材で
構成されていることを特徴とする根尖孔位置検出用ファ
イルクリップホルダー。1. An apical hole position detecting measuring needle formed of a conductive needle member such as a reamer or a file is clipped to electrically detect that the tip of the apical hole position detecting measuring needle has reached the apex. In the file clip holder for apical hole position detection to detect, the file clip holder, a measurement electrode wire having a clip portion that is in contact with the measurement needle at the tip, and a protective tube through which the measurement electrode wire is inserted Wherein the measurement electrode wire and the protection tube are made of a flexible elastic member.
先端から突出して前記測定針に接触される剛性の導電性
部と、該剛性部に続く可撓弾性の導電性部と、該可撓弾
性部に続く剛性の導電性部から成ることを特徴とする請
求項１に記載の根尖孔位置検出用ファイルクリップホル
ダー。2. The measuring electrode wire protrudes from the distal end of the protective tube and contacts a measuring needle, a rigid conductive portion, a flexible elastic conductive portion following the rigid portion, and the flexible conductive portion. The apex hole position detecting file clip holder according to claim 1, comprising a rigid conductive portion following the elastic portion.
撓弾性部がＮｉＴｉであることを特徴とする請求項２に
記載の根尖孔位置検出用ファイルクリップホルダー。3. The apex hole position detecting file clip holder according to claim 2, wherein the rigid portion is made of stainless steel, and the flexible elastic portion is made of NiTi.
が金属又はウルテム等の耐熱部材で構成され、これら先
端側と把持側の間はシリコンチューブ又はテフロンチュ
ーブ等の可撓弾性部材で構成されていることを特徴とす
る請求項１乃至３のいずれかに記載の根尖孔位置検出用
ファイルクリップホルダー。4. The protection tube has a distal end and a gripping side made of a heat-resistant member such as metal or Ultem, and a portion between the distal end and the gripping side made of a flexible elastic member such as a silicon tube or a Teflon tube. The file clip holder for apical hole position detection according to any one of claims 1 to 3, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09198730A JP3103325B2 (en) | 1997-07-24 | 1997-07-24 | File clip holder for apical hole position detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09198730A JP3103325B2 (en) | 1997-07-24 | 1997-07-24 | File clip holder for apical hole position detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1142240A JPH1142240A (en) | 1999-02-16 |
| JP3103325B2 true JP3103325B2 (en) | 2000-10-30 |
Family
ID=16396040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09198730A Expired - Fee Related JP3103325B2 (en) | 1997-07-24 | 1997-07-24 | File clip holder for apical hole position detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3103325B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012019849A (en) * | 2010-07-13 | 2012-02-02 | Osada Res Inst Ltd | Dental root canal length measuring instrument |
| JP5420502B2 (en) * | 2010-09-08 | 2014-02-19 | 株式会社長田中央研究所 | Dental root canal length measuring instrument |
| JP5349436B2 (en) * | 2010-09-21 | 2013-11-20 | 株式会社長田中央研究所 | Dental root canal length measuring instrument |
| JP2013081568A (en) * | 2011-10-07 | 2013-05-09 | Osada Res Inst Ltd | File holder for measuring dental root canal length |
| WO2018201127A1 (en) * | 2017-04-28 | 2018-11-01 | Dentsply Sirona Inc. | Apex locator attachment |
| JP6626872B2 (en) * | 2017-11-29 | 2019-12-25 | 藤栄電気株式会社 | Canal instrument holder |
-
1997
- 1997-07-24 JP JP09198730A patent/JP3103325B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1142240A (en) | 1999-02-16 |
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