JPS62242290A - Coin identifier - Google Patents
Coin identifierInfo
- Publication number
- JPS62242290A JPS62242290A JP8546186A JP8546186A JPS62242290A JP S62242290 A JPS62242290 A JP S62242290A JP 8546186 A JP8546186 A JP 8546186A JP 8546186 A JP8546186 A JP 8546186A JP S62242290 A JPS62242290 A JP S62242290A
- Authority
- JP
- Japan
- Prior art keywords
- coin
- amplifier
- sensor
- amplification factor
- coins
- 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.)
- Granted
Links
- 230000003321 amplification Effects 0.000 claims description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 17
- 238000013459 approach Methods 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000010355 oscillation Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 230000005669 field effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910000570 Cupronickel Inorganic materials 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Testing Of Coins (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は硬貨の識別を電子的に行なう装置における識別
精度の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement in identification accuracy in a device for electronically identifying coins.
（ロ）従来の技術
かかる硬貨識別装置は例えば特公昭５９−１４７９８号
公報でも開示されているように、硬貨を交流磁界中に置
いたときの磁界の変化度によって硬貨を識別するもので
ある。第２図に代表例を示すと、硬貨（７）が転動通過
する硬貨通路（８）を挾み一対のセンサ（１）（２）を
配置して、判別装置（５）は硬貨（７ンの通過によりセ
ンサ（１バ２）の検出信号が入力すると、その信号値と
基準値記憶部（６）に予め設定している基準値と比較す
ることで硬貨の適正及び種類を識別する構成である。セ
ンサ（１）（２）はそれぞれコイルと磁性体で構成して
おり、硬貨（７）の検出方法としては、一方のセンサで
交流磁界を発生し他方のセンサでこれを受信して硬貨通
過時の減衰量を検出する方法や、または２つのセンサを
直列接続してコイルの損失分変化による発振振幅の変化
を検出する方法等がある。第３図はセンサ（１）（２）
を直列接続し発振振幅の変化を直流に変換して示す特性
図であるが、一方のセンサを発信に用い他方を受信に用
いた方法でも同様の傾向を示す、この特性図は、硬貨が
存在しない待機時において発振電圧は損失分が少ないの
で高い電圧値Ｖ、となり、硬貨が通過すると発振電圧は
徐々に減少し、例えば３種類の硬貨であればその最減少
値は硬貨の材質や厚さに応じて３通りの値Ｖ＝、Ｖ＝、
Ｖａとなることを示している。したがってこの最減少値
により硬貨の適正及び種類を識別するものであるが、硬
貨の材質が電気伝導度が大きく異なる銅と白銅のような
場合には、その最減少値の差は大きくなるために識別処
理しやずい。しかしながら現在において最も多く用いら
れる硬貨材料は白銅であり、我国の成る種硬貨と同じ白
銅を用いる外国の成る種硬貨とは厚さが近似しているた
めに最減少値の差が少なく、レベル検出器の安定度や基
準値記憶部が発生する基準電圧の安定度の点で両者を分
別することは困難となっている。(B) Prior art As disclosed in Japanese Patent Publication No. 59-14798, for example, such a coin identification device identifies coins based on the degree of change in the magnetic field when the coin is placed in an alternating current magnetic field. A typical example is shown in FIG. 2. A pair of sensors (1) and (2) are placed between the coin passage (8) through which the coin (7) rolls, and the discrimination device (5) detects the coin (7). When a detection signal is input from the sensor (1 bar 2) due to the passage of the coin, the signal value is compared with a reference value preset in the reference value storage unit (6) to identify the appropriateness and type of the coin. Sensors (1) and (2) each consist of a coil and a magnetic material, and the method for detecting coins (7) is to generate an alternating magnetic field with one sensor and receive it with the other sensor. There are methods such as detecting the amount of attenuation when a coin passes, or connecting two sensors in series and detecting changes in oscillation amplitude due to changes in coil loss.Figure 3 shows sensors (1) and (2).
This is a characteristic diagram showing the change in oscillation amplitude converted into DC when the sensors are connected in series, but the same tendency is also shown in a method in which one sensor is used for transmitting and the other is used for receiving. During standby, the oscillation voltage has a high voltage value V because the loss is small, and as a coin passes, the oscillation voltage gradually decreases. For example, if there are three types of coins, the minimum value depends on the material and thickness of the coin. Three values V=, V=,
This shows that Va. Therefore, this minimum reduction value is used to identify the appropriateness and type of the coin, but if the coin is made of materials such as copper and cupronickel, which have significantly different electrical conductivities, the difference in minimum reduction value will be large. Identification processing is difficult. However, the most commonly used coin material at present is cupronickel, and since the thickness of Japanese seed coins and foreign seed coins that use the same cupronickel are similar in thickness, there is little difference in minimum decrement value, and level detection It is difficult to distinguish between the two in terms of the stability of the device and the stability of the reference voltage generated by the reference value storage unit.
〈ハ）発明が解決しようとする問題点
したがってこのような硬貨を確実に分別するには、セン
サ（１）（２）の検出信号の増幅率を変更し最減少値の
差を大きくすればよい。第４図は増幅率を上げた場合の
特性図を示しており、■、は待機電圧Ｖｔを増幅したも
のであるが、ｖｌは元来大きな電圧のため増幅しても飽
和する。この飽和現象は第３図と第４図の各特性図の時
間軸Ｔに注目すると理解しやすい。すなわち第４図の特
性図は第３図の特性図と比べて待機電圧から最減少値の
電圧に到達するまでの時間が速い。<C) Problems to be solved by the invention Therefore, in order to reliably separate such coins, it is sufficient to change the amplification factors of the detection signals of sensors (1) and (2) to increase the difference in the minimum decrement value. . FIG. 4 shows a characteristic diagram when the amplification factor is increased, where ◯ indicates an amplified standby voltage Vt, but since vl is originally a large voltage, it will be saturated even if amplified. This saturation phenomenon can be easily understood by paying attention to the time axis T of each characteristic diagram in FIGS. 3 and 4. That is, in the characteristic diagram of FIG. 4, the time from the standby voltage to the voltage of the minimum decrease value is faster than that of the characteristic diagram of FIG. 3.
ところで第３図の特性図においてＶｃは転動硬貨の接近
を検出するときの判別レベルであり、センサ（１）（２
）の検出信号値がＶｃにまで減少すると硬貨が接近した
ことを判定するものである。このように硬貨の接近を検
出することで複数の硬貨が比較的に短い間隔でセンサ（
１）（２）を通過するような場合に有効となる。すなわ
ち硬貨を識別し、その結果に応じてソレノイド駆動によ
るゲートを制御して硬貨を振分ける装置では、このよう
に短い間隔で硬貨が通過するとソレノイドが追随できず
に誤振分となる。したがって先行硬貨に続いて短時間で
後続硬貨の接近を検出したときは硬貨の振分処理を停止
して、誤振分を未然に防止しようとするもので、このよ
うな例は実公昭５７−１７４０７号公報に開示されてい
る。しかしながら第４図の特性図によると検出信号が飽
和するために、硬貨がかなりセンサ（１）（２）にまで
接近しないと検出信号は判別レベルＶｃにまで到達しな
い、したがって短い間隔で複数の硬貨が通過する場合に
、後読硬貨の接近は間近になってしか判別できないこと
になり、振分処理の停止が遅れて誤動作を生じる。By the way, in the characteristic diagram of FIG. 3, Vc is the discrimination level when detecting the approach of a rolling coin, and sensor (1) (2
) is determined to have approached the coin when the detection signal value decreases to Vc. By detecting the approach of coins in this way, multiple coins can be detected by the sensor (
1) It is effective in cases where (2) is passed. In other words, in a device that allocates coins by identifying coins and controlling a gate driven by a solenoid according to the result, when coins pass at such short intervals, the solenoid cannot follow them and the coins are mis-distributed. Therefore, when the approach of a subsequent coin is detected within a short period of time following the preceding coin, the coin sorting process is stopped to prevent erroneous sorting. It is disclosed in Japanese Patent No. 17407. However, according to the characteristic diagram in Fig. 4, since the detection signal is saturated, the detection signal does not reach the discrimination level Vc unless the coin approaches the sensors (1) and (2) considerably. Therefore, multiple coins are detected at short intervals. , the approach of read-behind coins can only be determined from close quarters, and the stop of the sorting process is delayed, resulting in malfunctions.
上記点から本発明は、硬貨の接近を余裕をもって判別で
きるとともに、硬貨の通過によるセンサの最大変化値を
硬貨の特性に応じて確実に弁別できる硬貨識別装置を提
供するものである。In view of the above points, the present invention provides a coin identification device that can determine the approach of a coin with sufficient margin, and can also reliably determine the maximum change value of the sensor due to the passage of the coin, depending on the characteristics of the coin.
（ニ）問題点を解決するための手段
本発明の実施例をブロックにて示す第１図により構成を
述べる。硬貨の特性を検出するセンサ（１）（２）は増
幅率を切換可能な増幅器（３）に接続されている。硬貨
感知装置（４）は増幅器（３）の出力が所定レベルに達
すると、硬貨が接近しているとして増幅器（３）の増幅
率を切換える。そして判別装置（５）は切換わった増幅
率による前記増幅器（３）の出力信号の最大変化値を検
出し、基準値記憶部（６）に予め設定している基準値と
比較して硬貨の適正及び種類を識別する。しかして硬貨
がセンサ（１）（２）を通り過ぎ増幅器（３）の出力が
前記所定レベルを割ると、硬貨感知装置（４）は増幅器
（３）の増幅率を元に切換える。(d) Means for solving the problems The configuration will be described with reference to FIG. 1, which shows an embodiment of the present invention in blocks. Sensors (1) and (2) for detecting coin characteristics are connected to an amplifier (3) whose amplification factor can be switched. When the output of the amplifier (3) reaches a predetermined level, the coin sensing device (4) determines that a coin is approaching and switches the amplification factor of the amplifier (3). Then, the discrimination device (5) detects the maximum change value of the output signal of the amplifier (3) due to the switched amplification factor, and compares it with a reference value preset in the reference value storage section (6). Identify suitability and type. When a coin passes through the sensors (1) and (2) and the output of the amplifier (3) falls below the predetermined level, the coin sensing device (4) switches based on the amplification factor of the amplifier (3).
（＊）作用
上記構成により硬貨の接近を検出した後に増幅率を切換
えて、硬貨種類に応じた出力信号の最大変化値の差を大
きく検出する。(*) Effect With the above configuration, after detecting the approach of a coin, the amplification factor is switched to detect a large difference in the maximum change value of the output signal depending on the coin type.
（へ）実施例
第５図によって本発明の具体的な実施例を説明する。直
列接続のコイルをそれぞれ巻回して成るセンサ（１）（
２）はコルピッツ型の発振回路として動作し、抵抗等の
定数を選択することにより両センサ（１）（２）のコイ
ルの損失分に応じて発振時の振幅が変化する軟発振回路
を形成する。この発振回路の発振振幅はコンデンサＣＩ
にて交流会が取出されて増幅器（３）に印加諮れる。増
幅器（３）は演箕増幅器（９）と増幅率を決定するため
の複数の抵抗とから構成されて、周知の同相増幅器の接
続方法がとられて、マイナス入力端子には電源電圧■の
にの電圧を基準レベルとしてバイアスしており、増幅率
は帰還用抵抗Ｒ１と入力側抵抗Ｒ２にて決定されその値
はＲ＋／Ｒｔとなる。そして整流回路（１０）は増幅器
（３）の出力を整流するもので、 フンパレータ（１１
）の出力端にダイオード（１２）を接続してコンデンサ
（１３）を充電する構成である。このコンデンサ（１３
）の電圧はコンパレータ（１１）のマイナス入力端子に
印加しており、コンパレータ（１１）はコンデンサ（１
３）の電圧が増幅器（３）の出力電圧と等しくなるまで
充電を行なう、このような整流回路（１０）を用いるこ
とで整流用ダイオード（１２）の順方向の降下電圧が温
度により変化するために、整流電圧の誤差を防止できる
。そして整流回路（１０）は電圧変換回路（１４）を介
して制御部（１５）に接続きれている。電圧変換回路（
１４）は整流回路（１０）の出力を制御部（１５）にて
処理しやすいレベルにまで変換するものである。制御部
（１５）は第１図に示す硬貨感知装置（４）及び判別装
置（５）の機能を含み、電圧変換回路（１４）からの信
号の値と基準値記憶部（６）に設定されている設定信号
値とを比較することで、硬貨のセンサ（１）（２）への
接近やその適正及び種類を判定する。そして制御部（１
５）は硬貨の接近を検出すると、電界効果トランジスタ
（１６）のゲートに高レベルの信号を付与するようにな
っている。この電界効果トランジスタ（１６）は演算増
幅器（９）の入力側抵抗Ｒ１に並列接続される抵抗Ｒ８
にドレン側で接続されている。(F) Embodiment A specific embodiment of the present invention will be explained with reference to FIG. Sensor (1) consisting of series-connected coils wound around each other (
2) operates as a Colpitts-type oscillation circuit, and by selecting constants such as resistance, a soft oscillation circuit is formed in which the amplitude during oscillation changes according to the loss of the coils of both sensors (1) and (2). . The oscillation amplitude of this oscillation circuit is the capacitor CI
The exchange signal is taken out and applied to the amplifier (3). The amplifier (3) is composed of an amplifier (9) and a plurality of resistors for determining the amplification factor, and the well-known in-phase amplifier connection method is adopted, and the negative input terminal is connected to the power supply voltage ■. The amplification factor is determined by the feedback resistor R1 and the input resistor R2, and its value is R+/Rt. The rectifier circuit (10) rectifies the output of the amplifier (3), and the humperator (11)
) is connected to the output end of the diode (12) to charge the capacitor (13). This capacitor (13
) is applied to the negative input terminal of the comparator (11), and the comparator (11) is connected to the capacitor (1
Charging is performed until the voltage of 3) becomes equal to the output voltage of the amplifier (3). By using such a rectifier circuit (10), the forward voltage drop of the rectifier diode (12) changes depending on the temperature. In addition, errors in rectified voltage can be prevented. The rectifier circuit (10) is connected to the control section (15) via the voltage conversion circuit (14). Voltage conversion circuit (
14) converts the output of the rectifier circuit (10) to a level that can be easily processed by the control unit (15). The control unit (15) includes the functions of the coin sensing device (4) and discrimination device (5) shown in FIG. The proximity of the coin to the sensors (1) and (2), its suitability and type are determined by comparing the set signal value. And the control unit (1
5) is configured to apply a high level signal to the gate of the field effect transistor (16) when detecting the approach of a coin. This field effect transistor (16) has a resistor R8 connected in parallel to the input resistor R1 of the operational amplifier (9).
is connected to the drain side.
上記の構成で硬貨がセンサ（１）（２）に接近する前ま
での待機状態では、電圧変換回路（１４）の出力部であ
るＡ点の電位は第２図のｖｌを示している。With the above configuration, in the standby state before the coin approaches the sensors (1) and (2), the potential at point A, which is the output part of the voltage conversion circuit (14), shows vl in FIG. 2.
硬貨がセンサ（１）（２）に接近するにつれてＡ点の電
位が徐々に下降するが、この電圧は逐次制御部（１５）
にて検出されて、基準値記憶部（６）に設定されている
信号値Ｖｃと比較される。そしてＡ点の電位がＶｃに到
達すると、制御部（１５）は硬貨の接近を感知し電界効
果トランジスタ（１６）のゲートに高レベルの信号を出
力して導通させる。電界効果トランジスタ（１６）が導
通すると演算増幅器（９）のマイナス入力端子の入力抵
抗はＲ８からＲ８・ＲＳ／＜Ｒ，＋ＲＡ）に変化し、演
算増幅器（９）の増幅率はそれまでのＲ，／Ｒ，からＲ
８・（Ｒｘ＋Ｒａ）／Ｒｎ・Ｒ８となり増大する。した
がって増幅率が増大した後のＡ点の電位は第３図のよう
に変化し、制御部（１５）はこの特性に基づく信号によ
り硬貨の適正及び種類を判別することになる。すなわち
制御部（１５）はＡ点の電位を逐次検出して最減少値を
検出すると、硬貨種類に応じて基準値記憶部（６）に予
め設定している基準信号値Ｖ ＊ ’ 、 Ｖ ｓ ’
、 Ｖ ４ ’と比較して許容誤差範囲内で一致して
いるかによって硬貨の適正及び種類を判定する。そして
制御部（１５）は、硬貨がセンサ（１）（２）を通り過
ぎＡ点の電位がｖｃを越えると、電界効果トランジスタ
（１６）のゲートに低レベルの信号を出力し、増幅器（
３）の増幅率をＲ，／Ｒ，に切換えて待機状態にする。As the coin approaches the sensors (1) and (2), the potential at point A gradually decreases, but this voltage is successively controlled by the control unit (15).
The signal value Vc is detected and compared with the signal value Vc set in the reference value storage section (6). When the potential at point A reaches Vc, the control section (15) senses the approach of the coin and outputs a high level signal to the gate of the field effect transistor (16) to make it conductive. When the field effect transistor (16) becomes conductive, the input resistance of the negative input terminal of the operational amplifier (9) changes from R8 to R8・RS/<R, +RA), and the amplification factor of the operational amplifier (9) changes from the previous R. , /R, to R
8.(Rx+Ra)/Rn.R8 and increases. Therefore, after the amplification factor increases, the potential at point A changes as shown in FIG. 3, and the control section (15) determines the suitability and type of the coin based on a signal based on this characteristic. That is, when the control section (15) sequentially detects the potential at point A and detects the lowest value, it sets the reference signal values V*', Vs that are preset in the reference value storage section (6) according to the coin type. '
, V4' and determine whether the coin matches within the allowable error range to determine the appropriateness and type of the coin. When the coin passes through the sensors (1) and (2) and the potential at point A exceeds vc, the control unit (15) outputs a low-level signal to the gate of the field effect transistor (16), and outputs a low-level signal to the gate of the field effect transistor (16).
3) Switch the amplification factor to R, /R, and enter the standby state.
本例では硬貨の通過により発振振幅を減少するセンサで
説明したが、逆に出力を増大するようにしたセンサ構成
もある。前述の特公昭５９−１４７９８号公報のセンサ
は出力を増大する構成であり、この場合制御部（１５）
は硬貨の接近を検出すると増幅器（３）の増幅率を下げ
るように作用するものである。In this example, a sensor is described in which the oscillation amplitude is decreased by passage of a coin, but there is also a sensor configuration in which the output is increased conversely. The sensor disclosed in the above-mentioned Japanese Patent Publication No. 59-14798 has a configuration that increases the output, and in this case, the control section (15)
acts to lower the amplification factor of the amplifier (3) when it detects the approach of a coin.
（ト）発明の効果
本発明に依ると、硬貨の接近をより早く検知するととも
に、硬貨がセンサを通過したときには硬貨の特性を精度
良く検出できる。したがって複数の硬貨が接近して転動
している場合での誤振分の防止が可能となるばかりか、
特性の類似している硬貨どうしを確実に分別できる効果
がある。(g) Effects of the Invention According to the present invention, it is possible to detect the approach of a coin more quickly and to detect the characteristics of the coin with high accuracy when the coin passes through the sensor. Therefore, not only is it possible to prevent misallocation when multiple coins are rolling close together, but also
This has the effect of reliably separating coins with similar characteristics.
第１図は本発明の実施例をブロックにて示す図、第２図
は従来例図、第３図及び第４図はセンサ信号を異なる増
幅率で増幅した場合の信号波形を示す図、第５図は本発
明の具体−的な実施例を示す。
＜１）（２）・・・センサ、 （３）・・・増幅器、
（４）・・・硬貨感知装置、 （５）・・・判別装置。
出願人 三洋電機株式会社外１名
代理人 弁理士 西野卓嗣 外１名
第１図
第２図
ら
第３図
第４図
−丁FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram of a conventional example, FIGS. 3 and 4 are diagrams showing signal waveforms when sensor signals are amplified with different amplification factors, and FIG. Figure 5 shows a specific embodiment of the invention. <1) (2)...sensor, (3)...amplifier,
(4)...Coin sensing device, (5)...Discrimination device. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino and one other person Figure 1 Figure 2 et al Figure 3 Figure 4-D
Claims (1)
ンサに後続しており外部より増幅率が可変される増幅器
と、硬貨が前記センサに接近し該増幅器の出力が所定値
に達すると前記増幅率を切換える硬貨感知装置と、切換
わった増幅率による前記増幅器の出力にて硬貨を識別す
る判別装置とから成る硬貨識別装置。1. A sensor that detects the characteristics of a rolling coin, an amplifier that follows the sensor and whose amplification factor is externally variable, and when the coin approaches the sensor and the output of the amplifier reaches a predetermined value. A coin identification device comprising: a coin sensing device that switches the amplification factor; and a discrimination device that identifies coins based on the output of the amplifier based on the switched amplification factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61085461A JPH0833937B2 (en) | 1986-04-14 | 1986-04-14 | Coin identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61085461A JPH0833937B2 (en) | 1986-04-14 | 1986-04-14 | Coin identification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62242290A true JPS62242290A (en) | 1987-10-22 |
| JPH0833937B2 JPH0833937B2 (en) | 1996-03-29 |
Family
ID=13859520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61085461A Expired - Lifetime JPH0833937B2 (en) | 1986-04-14 | 1986-04-14 | Coin identification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0833937B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54114997U (en) * | 1978-01-31 | 1979-08-13 | ||
| JPS5690225A (en) * | 1979-12-24 | 1981-07-22 | Mitsubishi Electric Corp | Photosensor circuit |
-
1986
- 1986-04-14 JP JP61085461A patent/JPH0833937B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54114997U (en) * | 1978-01-31 | 1979-08-13 | ||
| JPS5690225A (en) * | 1979-12-24 | 1981-07-22 | Mitsubishi Electric Corp | Photosensor circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0833937B2 (en) | 1996-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |