baber/WOPTO huggingface dataset:
Patent JP-2003186426-A (JP)
Title: Display device making display on both top and reverse surfaces
Inventor: ASAI KATSUHIKO
IPC: G06F3/048
Filed: 2001-12-14
Abstract: <P>PROBLEM TO BE SOLVED: To provide a plane type both-surface display device which can easily be used like a book is handled, e.g. pages are turned over.  <P>SOLUTION: The display device has pages changed forward in one direction by repeatedly turning over the wrist around one side of the display device 2 as an axis of rotation (e.g. each time the device is rotated alternately clockwise and counterclockwise) while an end part is held in the hand. When every X pages are changed forward and pages 'P-X' and 'P' are displayed on the top and reverse side respectively, the display device A is rotated as shown by A and then the page 'P' on the reverse side becomes the top side, so that a user can read this page. The page 'P-X' having changed to the reverse side is rewritten with a page 'P+X'. Then the user can read the updated page 'P+X' by reversing the device (in a direction B). The page 'P' having moved to the reverse side is rewritten with a page 'P+2X'.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003184345-A (JP)
Title: Method for constructing iron tower supporting steel chimney
Inventor: SHIMAZAKI YASUYOSHI
IPC: E04H12/28
Filed: 2001-12-14
Abstract: <P>PROBLEM TO BE SOLVED: To construct an iron tower supporting steel chimney without using a large crane.  <P>SOLUTION: There is provided a method for constructing the iron tower supporting steel chimney, according to which the apex of an iron tower 2 is pre-constructed and self-supported, and a chimney main body 1 is jacked up depending on the support and guide of the iron tower 2, to thereby extend the chimney main body 1 downward. Then, the partially constructed chimney main body is self-supported, and the iron tower is jacked up depending on the support and guide of the chimney main body, to thereby extend the iron tower downward. Next, a base portion of the chimney main body is pre- constructed, and a lower end of the partially constructed chimney main body is rigidly connected to the base portion of the chimney main body, to thereby self-support the chimney main body. Further, a temporary fixing member to which a lower end of the partially constructed iron tower is rigidly connected, is set in a horizontally changeable and vertically rotatable manner, and the lower end of the partially constructed iron tower is rigidly connected to the fixing member, to thereby self-support the entire chimney main body.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003185719-A (JP)
Title: Device for estimating charging rate for secondary battery
Inventor: YUMOTO DAIJIRO
IPC: H01M10/48
Filed: 2001-12-18
Abstract: <P>PROBLEM TO BE SOLVED: To accurately estimate a charging rate SOC and other parameters even when a secondary battery is charged and discharged.  <P>SOLUTION: This charging rate estimating device for the secondary battery is a charging rate estimating device for measuring a current I and a terminal voltage V of the secondary battery, for estimating an open-circuit voltage V<SB>0</SB>based on measured values of the current I and the terminal voltage V using an adaptive digital filter, and for estimating the charging rate based on a relation between the preliminarily found open-circuit voltage V<SB>0</SB>and charging rate SOC. In the estimating device, a battery model of the secondary battery is defined as shown in Mathematical Expression 2, both members are time-differentiated in Mathematical Expression 3 equivalent to the Mathematical Expression 2 to find Mathematical Expression 4, an adaptive digital operation for the Mathematical Expression 4 is carried out to estimate coefficient parameters of A(s) and B(s) collectively, substitution with an estimated result is conducted in the Mathematical Expression 3 to find the open-circuit voltage V<SB>0</SB>, and a charging rate estimating means is provided to estimate the charging rate based on the relation between the preliminarily found open-circuit voltage V<SB>0</SB>and charging rate SOC.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003181261-A (JP)
Title: Inside vessel stirring apparatus
Inventor: KITAGAWA KIYOHIKO
IPC: B01F5/06
Filed: 2001-12-19
Abstract: <P>PROBLEM TO BE SOLVED: To provide an inside vessel stirring apparatus in which efficient stirring is carried out with high reliability even under a severe operation condition by enabling to stir an internally filled material without using a mechanical element such as a stirring blade.  <P>SOLUTION: In the inside vessel stirring apparatus 10 for stirring a plurality of kinds of materials filled inside a vessel 11 and each having different physical property or state, the inside of the vessel 11 is divided into a plurality of sections with partition walls 12 each having a communicating hole 15, the upper part of the sections are respectively connected to a pressurizing line and an evacuating line and a port switching valve 20 is provided in an intermediate part of the pressurizing line and the evacuating line.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002241874-A (JP)
Title: Hydrogen storage material having high density of non- conventional usable hydrogen storing sites
Inventor: OVSHINSKY STANFORD R
IPC: C22C16/00
Filed: 2001-12-19
Abstract: PROBLEM TO BE SOLVED: To provide a disordered hydrogen storage material having a hydrogen storable storage site existing with high density in local order. SOLUTION: The disordered multicomponent hydrogen storage material having remarkably high storage capacity due to a high density of usable hydrogen storage site (defect site of 1023/cm3) and/or remarkably small fine crystalline size shown in a graph in Figure is provided. The hydrogen storage material can be employed for electrochemical products, a fuel cell and a gas phase application. The material is manufactured to have the crystallite size of <200 Å, most preperably <100 Å and can be any of LaNi5 type or TiNi type.
Patent JP-2003181724-A (JP)
Title: Power supply device for electric discharge machining
Inventor: KANEHARA YOSHIHIDE
IPC: B23H1/02
Filed: 2001-12-19
Abstract: <P>PROBLEM TO BE SOLVED: To provide a power supply device for electric discharge machining which outputs a base electric current when generating electric discharge, slope shaped electric current increase and a peek electric current as an electric current wave form for the electric discharge machining, which returns inductance energy of supply lines at the time of cutting off of a machining current to a power source to rapidly reduce.  <P>SOLUTION: The power supply device has a high voltage voltage source HV, and a low voltage voltage source using the same as a power source and a first and a second current sources using the low voltage voltage source as a power source, respective current sources have diodes passing current from an input to an output. An output of the second current source and an output of the first current source are output through a current slope circuit increasing current at constant increasing rate, and through a switch switching on and off total current of both the current sources from a supply line as processed current. An other supply line are connected to a point of the series connection of a diode connected to the high voltage source HV and a switch.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003188569-A (JP)
Title: Structure for coping with bedewing in electronic apparatus case
Inventor: OYAMADA TAKASHI
IPC: H05K5/02
Filed: 2001-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a structure for coping with bedewing in an electronic apparatus which evaporates dew drops (waterdrops) generated inside the case using the amount of heat generated by a member having a high electrical conductivity for dissipating heat generated by heating elements mounted on a printed board inside the case, and then cools the inside of the case by the vaporization heat.  <P>SOLUTION: The case is assembled by fixing a main body section 1 and a case section 3 via a packing 4. In a lower part of the case, an air hole 6 passing through the inside of the case, a filter 7 for controlling the pressure which covers the air hole from the outside, and a dent 8 formed in a lower part of the inside of the case are provided. Inside the case, belt-like flexible sheets 13 and 14 which have their one end firmly abutted against heating elements 9 and 11 mounted on vertically mounted printed boards 10 and 12, respectively, with the other end extended to the dent. Dew drops generated inside the case are collected in the dent and then evaporated by heat generated by the heating elements propagated to the flexible sheets 13 and 14 to cool the inside of the case.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003195875-A (JP)
Title: Karaoke reserving method using portable telephone set
Inventor: SUZUKI HISANOBU
IPC: G10K15/04
Filed: 2001-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To provide a karaoke reservation system which makes it possible to reserve karaoke music and a room from anywhere by using a portable telephone set.  <P>SOLUTION: When a telephone call to a reservation center device 5 is made by using the portable telephone set 1 (access through the Internet), the reservation center device 5 transfers the access to a karaoke center 2 in the presence area of the portable telephone set. A server device 3 of the karaoke center communicates with the portable telephone set 1 to process the reservation of a room and music. When the user of the portable telephone set visits the karaoke center 2, the server device 3 authenticate the customer and plays the reserved music by a karaoke device when the authentication is successful.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003191520-A (JP)
Title: Imaging apparatus
Inventor: KANAI HIDETOSHI
IPC: H04N1/113
Filed: 2001-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To shorten a time elapsing before the quantity of light reaches an appropriate level by raising light emission of an LD quickly.  <P>SOLUTION: An APC circuit 100 for writing an image by performing main scanning on the surface of a photosensitive body with a laser beam being outputted from an LD1, outputting a sync detection signal defining a writing start position from a sync detection signal sensor by detecting the laser beam on the outside of main scanning region on the surface of the photosensitive body, and controlling the quantity of light of the LD1 based on the sync detection signal is provided with a hold capacitor circuit 9 subjected to charge/ discharge control based on the sync detection signal, and a feed forward circuit 5 arranged to output an addition current being fed to the LD1 at the time of sampling mode for controlling charge/discharge.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003191138-A (JP)
Title: Conveying positioning device for work
Inventor: TAKIGAWA SHUICHI
IPC: B23P19/00
Filed: 2001-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a conveying positioning device capable of smoothly and rapidly carrying out a positioning when a work is intermittently conveyed and positioned at a predetermined position.  <P>SOLUTION: The conveying positioning device is provided with a base member 11; an index table 12 in which a plurality of accommodation parts 13 opened to an outer edge part and upper and lower surface are formed at a predetermined space and the work accommodated in the accommodation part slides on an upper surface of the base member and is intermittently conveyed to a predetermined direction; a guide 14 provided opposed to an outer edge part of the index table 12 and preventing the work accommodated in the accommodation part from popping out from the outer edge part; and a suction hole 21 for positioning the work by butting the work to the guide and the base member when the work arrives at a predetermined position.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003197502-A (JP)
Title: Measuring method and exposing method, aligner, and method for manufacturing device
Inventor: FUJIMAKI NORIHIKO
IPC: G03F7/22
Filed: 2001-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To surely measure a difference in position error of an object as it moves.  <P>SOLUTION: A reticle microscope (observation area 52RA, 52RB) is used to successively observe a plurality of mark pairs on a reticle R and a pair of reference marks on a reference mark plate on a wafer stage, and to measure a positional difference of the respective marks to the reference mark while it moves on a reticle stage RST in Y-axis direction. The positional difference of the respective marks is used to obtain a relationship between the Y-axis direction position of the reticle R and the positional difference. Thus, a difference in position of the reticle R varying as an object according to its movement in Y-axis direction can be measured surely.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003194779-A (JP)
Title: Specifying method according to lead isotope ratio such as smuts
Inventor: KOIKE MASAMI
IPC: G01N1/02
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To accurately specify a generation source by analyzing the specification of the exhaust source of smuts around a thermoelectric power plant according to a lead isotope ratio instead of an electron microscope, an optical microscope, an element analysis, or the like.  <P>SOLUTION: A sample such as smuts discharged to environment is decomposed by a microwave. Obtained Pb is subjected to weight fractionation by an inductively coupled plasma massspectrograph to obtain an isotope ratio in the Pb, and the isotope ratio is compared with the Pb isotope ratio in an generation source in the method for specifying smuts or the like by the lead isotope ratio.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003197736-A (JP)
Title: Semiconductor device equipped with multi-layer wiring structure
Inventor: TAKANO YOICHI
IPC: H01L21/768
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a semiconductor device capable of effectively relaxing stress by the heat-shrinking of a package applied to a wiring layer of multi-layer structure and preventing the occurrence of a crack of a passivation film which is a film to protect a chip, or the like.  <P>SOLUTION: In the semiconductor device equipped with the multi-layer wiring structure in which lower layer wiring 13 and upper layer wiring 15 are formed on a semiconductor board 11 with an interlayer insulation film 14 between, the purpose is achieved by the semiconductor device equipped with the multi- layer wiring structure, which is characterized in that an opening in an interlayer insulation film 14 is made small to provide a wider area of the interlayer insulation film 14.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003195168-A (JP)
Title: Zoom lens
Inventor: ORI TETSUYA
IPC: G02B15/173
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To realize mounting of a zoom lens particularly on a compact digital camera by suppressing the fluctuation in aberrations during variable magnification and shortening the overall length of the lens while achieving a high variable power ratio and a wide angle of view.  <P>SOLUTION: The zoom lens has a first lens group G1 to a fourth lens group G4, successively from an object side. Variable power is performed by forming the first lens group G1 and the third lens group G3 as stationary groups and moving the second lens group G2 to an optical axis Z1 direction. The fluctuation in the image point position generated during variable power is corrected and the focusing by a change in an object distance is performed by moving the fourth lens group G4 to the optical axis Z1 direction. The second optical lens group G2 has, successively from the object side, a negative meniscus lens (L4) directing its concave face or plane toward the object side, a biconvex lens (L5) and a positive meniscus lens (L6) directing its convex face toward the object side. The fifth lens L5 and the sixth lens L6 form a doublet.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003191397-A (JP)
Title: Multi-layer structural body and its usage
Inventor: MIYAZUMI NOBUTA
IPC: B32B27/34
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a multi-layer structural body with excellent tear performance and additionally, with excellent pinhole resistance and impact resistance and its usage.  <P>SOLUTION: The multi-layer structural body comprises at least two layers of a resin composition (A) layer comprising a thermoplastic resin (A2) and a saponified substance (A1) of an ethylene-vinyl acetate copolymer and a resin composition (B) layer comprising a thermoplastic resin (B2) and a polyamide resin (B1) and is used for a sheathing bag for medical supplies.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003203625-A (JP)
Title: Lithium ion secondary battery
Inventor: MIYAJI MARIKO
IPC: H01M4/131
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery furnished with both high mass energy density and excellent cycle characteristics (capacity retention ratio at a long-term use).  <P>SOLUTION: With the secondary battery provided with a negative electrode having carbon and an alloy as a negative electrode active material of a laminated structure, a positive electrode capable of storing and discharging lithium ion, and an electrolyte arranged between the positive electrode and the negative electrode, Li content of an alloy layer in the negative electrode at a discharging depth of 100% is to be 31% to 67%.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003160146-A (JP)
Title: Article packaging bag
Inventor: SUGIMOTO MITSUO
IPC: B65D33/14
Filed: 2001-11-26
Abstract: <P>PROBLEM TO BE SOLVED: To package a three-dimensional article in an article packaging bag.  <P>SOLUTION: A pressure-sensitive adhesive is applied to a front film of a bag part of the article packaging bag so as to stick a three-dimensional article storage box on the front film thereof, and a release coated paper for preventing the adhesion of other objects to a coated surface except in use is attached to the coated surface, so that the article packaging bag can be formed. The article packaging bag is constituted so that the release coated paper, which is attached to the pressure-sensitive adhesive coated surface of the bag part, can be removed, so that the pressure-sensitive adhesive can be exposed, and so that the three-dimensional article storage box can be stuck on the coated surface.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003501898-A (JP)
Title: 複数のビデオストリームをそれぞれのビューアのセットに送るための共有制御回路を有するスケーラブルビデオシステム
IPC: G06F9/50
Filed: 2000-05-17
Abstract: (57)【要約】
ビデオシステムは、ａ）単一のスーパーバイザプロセッサ（１０）および数が選択可能で単一のスーパーバイザプロセッサにバス（３０）を介して結合される複数のコプロセッサ（２０−１、２０−２、…）と、ｂ）スーパーバイザプロセッサに結合され、いくつかのビデオストリームの各々のそれぞれの部分（１２）を格納するスーパーバイザメモリ（１１）と、ｃ）格納されたビデオストリーム部分をスーパーバイザメモリから選択的に読出し、読出されたビデオストリーム部分の各々を別のビューアに送る、各コプロセッサ内の制御プログラム（２４）と、ｄ）スーパーバイザメモリ内の各ビデオストリームの格納された部分を動的に更新し、各ビデオストリームのそれぞれのビューアを変更するための外部要求を提供する、単一のスーパーバイザプロセッサに対する制御プログラム（１４）とからなる。
Patent JP-2003505682-A (JP)
Title: 大きな物体の幾何学的形状を走査するシステム
IPC: G01B11/24
Filed: 2000-07-10
Abstract: (57)【要約】
表面の幾何学的形状を局所的に一点毎に検出する装置（２）を備えたセンサーユニット（１）、および該センサーユニット（１）を動かすためのロボットユニット（４）を具備した物体（６）の表面の幾何学的形状を検出するシステムにおいて、該センサーユニット（１）は該物体の表面の幾何学的形状を非接触的に探査検出するための光学的スキャナーユニット（２）、および既知の位置にある基準点（９）のネットワーク（８）によって定義される全体的な座標系の中における該センサーユニット（１）の位置を決定するように設計された位置測定ユニット（３）を含にでいるシステム。さらに計算ユニット（５）が備えられ、該計算ユニット（５）はスキャナーユニット（２）および位置測定ユニット（３）からのデータを集め、スキャナーユニット（２）からのデータを全体的な座標系に関係付けるために変換するように設計されている。またさらに物体（６）の表面の幾何学的形状を検出する方法、およびセンサーユニット（１）を較正する方法が提供される。
Patent JP-2003507375-A (JP)
Title: レチノイド様剤としてのジヒドロアミノベンゾ［ｂ］および［ｃ］フラン
IPC: A61P17/00
Filed: 2000-07-24
Abstract: (57)【要約】
式1および式2：
【化１】
 【化２】
 ［式中、記号は明細書中に定義する通りである。］で示される化合物は、レチノイド様生物学的活性を有する。
Patent JP-2003509089-A (JP)
Title: 診断評価のための痰サンプルを誘導するための方法および装置
IPC: A61B17/00
Filed: 2000-07-13
Abstract: (57)【要約】
本発明は、患者から痰を誘導するための方法、患者からこれらのサンプルを誘導および収集するための装置、および痰サンプルを使用する肺障害について、患者を評価する方法を開示する。痰サンプルを誘導する方法は、患者の胸部に振動力を適用し、一方で、同時に、患者にマウスピースを提供して、空気流の速度を最大にする工程を包含する。好ましい実施形態において、患者は、直立位置に維持され得、そしてまた、ポートを介してマウスピースに接続されたネブライザーを提供され得る。
Patent JP-2003529546-A (JP)
Title: システインプロテアーゼの可逆的インヒビターとして有益な新規スピロ複素環化合物
IPC: C07D207/16
Filed: 2000-08-28
Abstract: (57)【要約】
本明細書に更に特定された式(I)、(II)、(Ia)及び(Ib)
【化１】
 の新規なカテプシンＳ、Ｋ、Ｆ、Ｌ及びＢ可逆的抑制化合物が開示される。これらの化合物は自己免疫疾患を治療するのに有益である。また、このような新規化合物の製造方法が開示される。
Patent JP-2003510359-A (JP)
Title: 化合物および方法
IPC: A61K31/4709
Filed: 2000-09-29
Abstract: (57)【要約】
本発明は、癌、血管腫、増殖性網膜症、慢性関節リウマチ、アテローム性動脈硬化性血管新生、乾癬、眼球血管新生および肥満症のような血管形成により媒介される症状の治療に有用な非ペプチド性の、２型メチオニンアミノペプチダーゼの不可逆的な阻害剤である。
Patent JP-2003511787-A (JP)
IPC: G06F9/45
Filed: 2000-09-06
Abstract: A method of maintaining translation context for instructions translated from instructions designed for a target microprocessor to run on a host microprocessor including storing translation context related to each translated host instruction, indicating a translation context for host instructions presently being executed by the host processor, comparing translation context stored for a next host instruction with the translation context for a host instruction presently being executed, executing the next host instruction if the translation context of the next host instruction and the presently executing host instruction compare, and searching for an instruction with translation context which compares to the translation context of the host instruction presently executing if the translation context of the next host instruction and the presently executing host instruction do not compare.
Patent JP-2003525398-A (JP)
Title: ダブルマスフライホイール
IPC: F16F15/315
Filed: 2000-10-23
Abstract: (57)【要約】
内燃機関用のダブルマスフライホイール（１）は、駆動側フライホイール（３）及び出力側フライホイール（５）を有し、これらのフライホイールは、相互に同心に取り付けられるとともにトルクを伝達するねじりばね（７）を介して相互に結合され、かつ相互に相対的に制限されて回転可能である。駆動側フライホイール（３）は、回転数適応式振動吸収装置（21）のハブ部（22）と結合している。ハブ部（22）内に複数の制振質量体（23）が収容され、この制振質量体のそれぞれが、フライホイールの回転軸（２）に対して平行かつ空間的に離れている旋回軸を中心に旋回可能である。
Patent JP-2003516127-A (JP)
Title: 延長第一シグナル伝達モチーフを有するポリペプチド
IPC: C07K14/47
Filed: 2000-11-01
Abstract: (57)【要約】
本発明は、Y-X 2 -L/I-X n -Y-X 2 -L/I、ｎは9以上の共通アミノ酸配列を含む新規第一シグナル伝達モチーフを含む細胞質シグナル伝達配列に関するものである。この新規モチーフは、特にキメラ受容体の細胞内シグナル伝達ドメインの中に組み込まれた場合に、免疫細胞シグナル伝達を仲介するのに極めて有効である。その非天然刺激性第一シグナル伝達モチーフをコードする核酸及びそれを含むポリペプチドが記述され、それらは医薬に使用するのに適している。
Patent JP-2003516559-A (JP)
Title: ディジタルオーディオデータ復号化方法
IPC: H04H20/00
Filed: 2000-11-07
Abstract: (57)【要約】
ここで提案されるのは、デジタルオーディオデータ復号化方法であり、これは、エラーカウントに依存してエラーコンシールメントを実行するのに使用され、ここでは履歴も考慮される。このために本発明では等化器値を決定し、これを用いて、受信したデジタルオーディオデータの逆量子化を行う。この等化器値は記憶されるかまたは計算される。エラーカウントがあらかじめ定めた最大の閾値を上回る場合、ミューティング回路が起動される。エラーカウントが最小の閾値を下回る場合、逆量子化のために等化器値を使用しない。
Patent JP-2003517639-A (JP)
IPC: G02B3/04
Filed: 2000-12-18
Abstract: Described is a single vision spectacle lens for spherical or astigmatic prescriptions. It is characteristic of the present invention that at least one surface is an atoroidal surface, and that along at least one line the refraction defect and the astigmatic defect for viewing angles of up to 40° are each smaller than ±0.15 dpt. In the case of an astigmatic prescription the deviation of the cylinder axis or axis orientation from the prescribed cylinder axis or axis orientation is smaller than 1°.
Patent JP-2003528487-A (JP)
IPC: G06K7/00
Filed: 2000-12-14
Abstract: Read device (100) including a power stage and a read antenna (110) making it possible to generate an electromagnetic field for excitation of at least one transponder (10) situated in the field of the antenna, this transponder including a receiving antenna (11) and associated changeover-switching means (12) allowing it to modify the state of the receiving antenna and thus to transmit information to the read device, by modification of the coupling between the read antenna and the receiving antenna. The read device includes detection means which are configured to reduce the noise or the fluctuations, in the signal from the antenna, which are due to the electronic components of the power stage, and to generate a useful signal from the change in the signal from the read antenna by comparison with a reference signal, this reference signal being representative of the signal from the read antenna when the receiving antenna of the transponder is in a predetermined state, the useful signal being representative of the changes of state of the receiving antenna.