WO1995023358A1 - Dispositif portatif a fonction de capteur - Google Patents
Dispositif portatif a fonction de capteur Download PDFInfo
- Publication number
- WO1995023358A1 WO1995023358A1 PCT/JP1995/000185 JP9500185W WO9523358A1 WO 1995023358 A1 WO1995023358 A1 WO 1995023358A1 JP 9500185 W JP9500185 W JP 9500185W WO 9523358 A1 WO9523358 A1 WO 9523358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- sensor
- circuit
- power supply
- reference voltage
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G21/00—Input or output devices integrated in time-pieces
- G04G21/02—Detectors of external physical values, e.g. temperature
Definitions
- the present invention provides a sensor that detects, displays, and warns physical information such as water depth and altitude.
- the present invention relates to a portable device with a sensor function having a sensor function.
- FIG. 2 is a block diagram of an example of a conventional sensor signal processing device used for a mobile device with a sensor function.
- 101 is a barometric pressure sensor that outputs a barometric pressure signal SI proportional to barometric pressure P
- 102 is a sensor drive circuit that drives the barometric pressure sensor 101 by passing a constant current
- 103 is an operational amplifier (not shown).
- FIG. 7 is a diagram showing the internal configuration of the sensor drive circuit 102.
- the sensor drive circuit 102 includes a resistor 102a having a resistance value Rs, and an operational amplifier 102b powered by a power supply voltage Vss of ⁇ 3.0 V.
- One input terminal of the operational amplifier 102b has the same potential Vs as the + input terminal by imaginary short using the atmospheric pressure sensor 101 as a feedback resistor. Therefore, the constant current Is expressed by the equation (1) flows through the resistor 102a, and the atmospheric pressure sensor 101 is driven by the constant current Is.
- FIG. 9 is a diagram showing the internal configuration of the constant voltage power supply circuit 107.
- the constant voltage power supply circuit 107 includes a basic reference voltage generator 107a composed of a resistor RQ and a constant current circuit 173, and a constant voltage generator 171.
- the constant current circuit 173 supplies a constant current Ir to the resistor R0, generates a reference voltage Vr by a voltage drop, and supplies the reference voltage Vr to the constant voltage generator 1-1.
- the constant voltage generator 171 amplifies the reference voltage Vr by the voltage Z current, and supplies the power supply voltage Vreg of ⁇ 2.6 V to the amplifier 103 and the A / D converter 104.
- the conventional sensor signal processing device having the above circuit configuration operates as follows.
- the voltage Vss of the coin-type lithium battery 109 is used as a power supply, and the barometric pressure sensor 101 is When driven at a constant current by the driving circuit 102, it outputs a barometric pressure signal S 1 proportional to the barometric pressure P applied to the barometric pressure sensor 101.
- the atmospheric pressure signal S1 is amplified by the amplifier circuit 103 with reference to a voltage Vreg / 2, which is half the power supply voltage Vreg, to become a signal S1 '.
- the amplified signal S1 ' is digitally converted by an A / D conversion circuit 104 into a difference between the signal SI' and the voltage Vreg / 2 based on the voltage Vreg Z2, and becomes digital data Dc.
- the digital data Dc is converted into a sensor information signal Dj by the sensor information processing circuit 105, and the display device 106 displays an atmospheric pressure value (for example, 1013 hPa) based on the sensor information signal Dj.
- the signal SI ′ amplified by the amplification circuit 103 fluctuates in the range from the voltage Vreg / 2 to the voltage Vreg shown in FIG. 10, and the potential difference between Vreg and Vreg / 2 becomes a dynamic range.
- the dynamic range of the amplified signal S1 'from the amplifier circuit 103 needs to be widened in consideration of the display resolution and the bit error at the time of AZD conversion. For this reason, the power supply voltage Vreg needs to be about 2.6 V. To generate such a Vreg, the constant voltage power supply circuit 107 requires a power supply voltage Vss of at least 13.0 V or less. As 109, it was necessary to generate a voltage of 3 V or more.
- the present invention has been made in view of the above points, and has a small size and a small cost.
- An object of the present invention is to provide a mobile device with a sensor function that can ensure the resolution and reproducibility of AZD conversion using only one V-button silver battery.
- the present invention provides a sensor for detecting physical information, a sensor drive circuit for driving the sensor, an amplifier circuit for amplifying a sensor signal from the sensor, and a digital output signal of the width circuit.
- An A / D conversion circuit for converting the information into information; a sensor information data processing circuit for creating sensor information data from digital information output from the A / D conversion circuit; and a sensor information data from the sensor information data processing circuit.
- a portable device with a sensor function having a display device for displaying a physical quantity by using a battery, which is a low-voltage power supply; and a boosting power supply circuit for boosting a low voltage of the battery to a high voltage.
- the AZD conversion circuit is driven by the high voltage boosted by the boost power supply circuit. You configure a mobile device with a sensor function.
- the present invention further includes a constant voltage power supply circuit for stabilizing the high voltage boosted by the boost power supply circuit, wherein the amplification circuit and the A / D conversion circuit are stabilized by the constant voltage power supply circuit.
- a portable device with a sensor function was configured to be driven by the high voltage.
- FIG. 1 is a block diagram of a sensor signal processing device used in an embodiment of a mobile device with a sensor function according to the present invention
- FIG. 2 is an example of a conventional sensor signal processing device used in a mobile device with a sensor function
- Block diagram, Fig. 3 is a block diagram when the sensor signal processing device shown in Fig. 1 is applied to an electronic timepiece with sensor function
- Fig. 4 is the constant voltage power supply shown in Figs. 1 and 3.
- Block diagram showing the internal configuration of the circuit Fig. 5 shows the circuit configuration of the constant voltage power supply circuit shown in Fig. 4, and Fig. 6 shows the internal configuration of the sensor drive circuit shown in Figs. 1 and 3.
- FIG. 7 is a diagram showing the internal configuration of the sensor drive circuit shown in FIG. 2
- FIG. 8 is a diagram showing the internal configuration of the constant voltage power supply circuit shown in FIG. 1
- FIG. Fig. 9 shows the internal configuration of the constant voltage power supply circuit. It is a figure which shows each electric potential relationship.
- FIG. 1 is a block diagram of a sensor signal processing device used in an embodiment of a mobile device with a sensor function according to the present invention.
- the mobile device with a sensor function illustrated here is designed to display the atmospheric pressure. It was done.
- 1 is a barometric pressure sensor that outputs a barometric pressure signal S1 proportional to barometric pressure P
- 2 is a sensor drive circuit that drives a barometric pressure sensor 1 by passing a constant current
- 3 is a barometric pressure signal S1 using an operational amplifier (not shown).
- the amplifier 4 amplifies the signal S1 'and outputs it as a signal S1'
- the AZD converter 4 converts the signal S1 'output from the amplifier 3 into AZD and outputs it as Dc
- the processor 5 processes the converted data Dc.
- 6 is a sensor information data processing circuit which converts the data into sensor information data Dj and outputs the data Dj.
- , 7 is a constant voltage power supply circuit that generates one 0.5 V sensor reference voltage Vs, one 1.3 V measurement reference voltage Vc, and ⁇ 2,6 V stable power supply voltage Vm, and 8 is one 1.5 V Double the battery voltage Vssl, and increase the voltage by 3.0V Step-up power supply circuit 9 generates voltage Vss2, and button-type silver battery 9 generates a battery voltage Vssl of 1.5 V.
- FIG. 3 is a block diagram when the sensor signal processing device shown in FIG. 1 is applied to an electronic timepiece with a sensor function.
- the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
- Reference numeral 10 denotes a microcomputer for controlling the operation of the entire electronic timepiece with a sensor function.11 receives data Dc from the AZD conversion circuit, and receives a command from the microcomputer 10 and outputs a sensor driving circuit 2, an amplification circuit 3, and an AZD.
- the control circuit outputs a control signal C for controlling the conversion circuit 4 and the constant voltage power supply circuit 7.
- the control circuit 11 outputs the data Dc to the microcomputer 10 via the data bus, and the microcomputer 10 processes the data Dc and converts it into sensor information data. Output on the data bus.
- Reference numeral 12 denotes a clock unit driving circuit that is controlled by the microcomputer 10 and drives the clock unit 13; 13 denotes a clock unit that displays time and the like; and 14 denotes a data bus output from the microcomputer computer 10.
- a display control circuit 15 controls the display to display the sensor information data, and 15 is a display unit controlled by the display control circuit 14 to digitally display the air pressure value.
- the control circuit 11, the microcomputer 10, and the display control circuit 14 correspond to the sensor information data processing circuit 5 shown in FIG.
- the button type silver battery 9 is also used as a power source for each control unit of the clock unit 13.
- FIG. 4 is a block diagram showing the internal configuration of the constant voltage power supply circuit 7 shown in FIGS. 1 and 3.
- the constant voltage power supply circuit 7 includes a basic reference voltage generator 7a and a constant voltage generator 71, and furthermore, the constant voltage generator 71 generates an operation reference voltage generator 72 and a stable power supply voltage Vni.
- the operation reference voltage generator 72 includes a sensor reference voltage generator 7b that generates the sensor reference voltage Vs and a measurement reference voltage generator that generates the measurement reference voltage Vc. 7c.
- the voltage generated by the operation reference voltage generator 72 that is, both the sensor reference voltage V s and the measurement reference voltage V c are referred to as an operation reference voltage.
- FIG. 5 is a circuit configuration diagram of the constant voltage power supply circuit 7 shown in FIG.
- the basic reference voltage generator 7a includes a resistor R0 and a constant current circuit 73
- the sensor reference voltage generator 7b includes an operational amplifier 74
- the measurement reference voltage generator 7c includes resistors R1 and R1.
- the stable power supply voltage generator 7 d includes resistors R 3 and R 4 and an operational amplifier 76.
- the basic reference voltage Vr from the basic reference voltage generator 7a is applied to the + input terminals of the operational amplifiers 74, 75 and 76, and the operational amplifiers 74 and 75 use the battery voltage V ssl as the power supply.
- Reference numeral 6 uses the boosted voltage V ss2 as a power supply.
- the ratio of the resistance values of the resistor R 1 and the resistor R 2 is determined so that the measurement reference voltage V c output from the operational amplifier 75 becomes ⁇ 1.3 V.
- the ratio of the resistance value of R4 is determined so that the stable power supply voltage Vm output from the operational amplifier 76 becomes -2.6 V.
- FIG. 6 is a diagram showing the internal configuration of the sensor drive circuit 2 shown in FIGS. 1 and 3.
- the sensor driving circuit 2 includes a resistor 2 a having a resistance value Rs and an operational amplifier 2 b powered by a power supply voltage Vssl of —1.5 V.
- One input terminal of the operational amplifier 2b has the same potential as the sensor reference voltage Vs applied to the + input terminal by an imaginary short using the barometric pressure sensor 1 as a feedback resistor. Therefore, the constant current Is flows through the resistor 2a, and the atmospheric pressure sensor 1 is driven by the constant current Is.
- FIG. 8 is a diagram showing an internal configuration of the constant voltage power supply circuit 7 shown in FIGS. 1 and 3.
- the constant voltage drive circuit 7 includes a basic reference voltage generator 7a composed of a resistor R0 and a constant current circuit 73, and a constant voltage generator 71.
- the constant current circuit 73 supplies a constant current Ir to the resistor R0, generates a basic reference voltage Vr by voltage drop, and supplies the basic reference voltage Vr to the constant voltage generator 71.
- the constant voltage generator 71 amplifies the basic reference voltage Vr by the voltage Z current, applies the sensor reference voltage Vs of 0.5 V to the sensor driving circuit 2 and the measurement reference voltage Vc of 1.3 V to the amplifier circuit 3 and In order to stabilize the measurement system even when the voltage of the button-type silver battery 9 fluctuates due to load fluctuations, etc., the AZD conversion circuit 4 applies a stable power supply voltage Vm of 1.6 V Supply 4 respectively.
- the constant voltage power supply circuit 7 operates the basic reference voltage generator 7a at the battery voltage Vssl of 1.5 V, and generates the stable power supply voltage of the constant voltage generator 71.
- Section 7d is operated with the boost voltage Vss2 of one 3.0V.
- the boost power supply circuit 8 uses a charge pump that performs switching by transistors and the like.
- the boosted voltage Vss2 is used to generate the boosted voltage Vss2. If the basic reference voltage generator 7a is operated with the boosted voltage Vss2, the output voltage may change due to the influence of the switching noise in Vss2.
- Another advantage of setting the power supply of the basic reference voltage generator 7a to Vssl is that a constant current Ir is supplied to the resistor R0 by the constant current circuit 73 included in the basic reference voltage generator 7a. A voltage Vr is generated. At this time, the power Pr consumed by the constant current circuit 73 is expressed by the following equation (2).
- the battery voltage Vssl is half of the boosted voltage Vss2
- the power consumption Pr is half of that when operated with the boosted voltage Vss2 of -3.0 V, which also has the effect of extending the battery life. .
- the stable power supply voltage generator 7 d of the constant voltage generator 71 needs to output a voltage higher than the battery voltage Vssl with its output voltage being 12.6 V. Generates a stable power supply voltage Vm using the boosted voltage Vss2 as a power supply and outputs a voltage lower than Vssl.
- the sensor reference voltage generator 7b and the measurement reference voltage generator 7c of the constant voltage generator 71 generate the basic reference voltage. For the same reason as in section 7a, the sensor reference voltage Vs and the measurement reference voltage Vc are generated using the battery voltage V ssl as a power supply.
- the sensor drive circuit 2 drives the barometric pressure sensor 1 with the battery voltage Vssl as a power source, based on the sensor reference voltage Vs from the constant voltage power supply circuit 7. Therefore, the power Ps consumed by the sensor drive circuit 2 is expressed by equation (3).
- the battery voltage Vssl is half of the boosted voltage Vss2
- the power consumption Ps is half of the case of operating with the boosted voltage Vss2 of 1.OV, which also has the effect of extending the battery life. .
- the output of the barometric pressure sensor 1 is determined by the constant current Is from the sensor drive circuit 2, even if the power supply voltage is changed from Vss2 to Vssl, if the constant current value Is is set to the same value, the voltage level of the barometric pressure signal S1 will be does not change.
- the atmospheric pressure signal S1 is amplified by the amplifier 3 as in the past.
- the AZD conversion circuit 4 converts the amplified signal S 1 ′ into digital data D c.
- the data D c is converted into sensor information data D j by the sensor information data processing circuit 5 using the power supply voltage V ssl as a power source, and the display device 6 displays the atmospheric pressure value based on the sensor information data D j.
- a booster power supply circuit is provided, and the boosted voltage and the battery voltage are appropriately combined and supplied to each circuit, so that the conventional function is not impaired.
- Sensor signal processing can be performed using a single 1.5 V button-type silver battery.
- the compactness of portable equipment with a sensor function increases the degree of freedom in designing and has a significant effect on cost reduction.
- power consumption can be reduced by operating the sensor drive circuit at 11.5 V, and power consumption can be reduced by operating the basic reference voltage generator at 11.5 V. At the same time, there is an effect that the influence of the switching noise of the boosted voltage can be avoided.
- the present invention can be used for a dive computer, an altimeter, a depth gauge, an electronic timepiece with a sensor function, and the like.
- the sensor function can correspond to any sensor that detects constantly changing physical information such as pressure such as air pressure and water pressure and temperature.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52224895A JP3546887B2 (ja) | 1994-02-25 | 1995-02-10 | センサ機能付携帯機器 |
EP95907869A EP0706101B1 (en) | 1994-02-25 | 1995-02-10 | Portable device with sensor function |
DE69509997T DE69509997T2 (de) | 1994-02-25 | 1995-02-10 | Tragbares gerät mit sensorfunktion |
US08/535,043 US6466521B1 (en) | 1994-02-25 | 1995-02-10 | Sensor function-equipped portable device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6/28036 | 1994-02-25 | ||
JP2803694 | 1994-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995023358A1 true WO1995023358A1 (fr) | 1995-08-31 |
Family
ID=12237514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/000185 WO1995023358A1 (fr) | 1994-02-25 | 1995-02-10 | Dispositif portatif a fonction de capteur |
Country Status (5)
Country | Link |
---|---|
US (1) | US6466521B1 (ja) |
EP (1) | EP0706101B1 (ja) |
JP (1) | JP3546887B2 (ja) |
DE (1) | DE69509997T2 (ja) |
WO (1) | WO1995023358A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004089196A1 (ja) * | 2003-04-01 | 2004-10-21 | Olympus Corporation | 被検体内情報取得装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1499064A1 (en) * | 2003-07-16 | 2005-01-19 | Alcatel | Combining point-to-point information and point-to-multipoint information in a radio network controller |
JP4413831B2 (ja) * | 2005-08-11 | 2010-02-10 | 株式会社日立ハイテクノロジーズ | ウェハ表面検査装置及びウェハ表面検査方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS533864A (en) * | 1976-06-30 | 1978-01-13 | Seiko Instr & Electronics Ltd | Electronic watch |
JPS56125683A (en) * | 1980-03-10 | 1981-10-02 | Ricoh Elemex Corp | Power source device for electronic watch |
JPS576384A (en) * | 1980-06-13 | 1982-01-13 | Hitachi Ltd | Power source circuit and electronic watch using this |
JPS5712383A (en) * | 1980-06-24 | 1982-01-22 | Citizen Watch Co Ltd | Boosting circuit for electronic timepiece |
JPS58129195U (ja) * | 1983-01-12 | 1983-09-01 | シチズン時計株式会社 | 全電子式時計 |
JPH01259220A (ja) * | 1988-04-08 | 1989-10-16 | Citizen Watch Co Ltd | センサ信号処理装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4290100A (en) * | 1980-03-24 | 1981-09-15 | Intersil, Inc. | Four terminal voltage tripler for monolithic LCD clock circuit |
JPS5731333A (en) * | 1980-07-31 | 1982-02-19 | Suwa Seikosha Kk | Power source circuit system |
JPS57211087A (en) * | 1981-06-22 | 1982-12-24 | Seiko Instr & Electronics Ltd | Boosting circuit of electronic timepiece element |
JPS58129195A (ja) | 1982-01-28 | 1983-08-02 | Matsushita Electric Ind Co Ltd | 熱交換器 |
GB2202950B (en) * | 1987-03-17 | 1990-09-12 | Citizen Watch Co Ltd | Sensor signal processor |
US5224059A (en) * | 1988-06-07 | 1993-06-29 | Citizen Watch Co., Ltd. | Device for measuring altitude and barometric pressure |
US5283474A (en) * | 1990-06-27 | 1994-02-01 | Idec Izumi Corporation | Circuit for driving a load by using selectively one of two different DC power sources |
EP0522496B1 (en) * | 1991-07-08 | 2002-03-06 | Denso Corporation | Thermal type flowmeter |
JPH0774638A (ja) * | 1993-08-31 | 1995-03-17 | Mitsubishi Electric Corp | A−d変換器 |
-
1995
- 1995-02-10 JP JP52224895A patent/JP3546887B2/ja not_active Expired - Lifetime
- 1995-02-10 EP EP95907869A patent/EP0706101B1/en not_active Expired - Lifetime
- 1995-02-10 US US08/535,043 patent/US6466521B1/en not_active Expired - Fee Related
- 1995-02-10 WO PCT/JP1995/000185 patent/WO1995023358A1/ja active IP Right Grant
- 1995-02-10 DE DE69509997T patent/DE69509997T2/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS533864A (en) * | 1976-06-30 | 1978-01-13 | Seiko Instr & Electronics Ltd | Electronic watch |
JPS56125683A (en) * | 1980-03-10 | 1981-10-02 | Ricoh Elemex Corp | Power source device for electronic watch |
JPS576384A (en) * | 1980-06-13 | 1982-01-13 | Hitachi Ltd | Power source circuit and electronic watch using this |
JPS5712383A (en) * | 1980-06-24 | 1982-01-22 | Citizen Watch Co Ltd | Boosting circuit for electronic timepiece |
JPS58129195U (ja) * | 1983-01-12 | 1983-09-01 | シチズン時計株式会社 | 全電子式時計 |
JPH01259220A (ja) * | 1988-04-08 | 1989-10-16 | Citizen Watch Co Ltd | センサ信号処理装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0706101A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004089196A1 (ja) * | 2003-04-01 | 2004-10-21 | Olympus Corporation | 被検体内情報取得装置 |
Also Published As
Publication number | Publication date |
---|---|
EP0706101A4 (en) | 1996-07-17 |
US6466521B1 (en) | 2002-10-15 |
DE69509997D1 (de) | 1999-07-08 |
EP0706101B1 (en) | 1999-06-02 |
EP0706101A1 (en) | 1996-04-10 |
DE69509997T2 (de) | 1999-11-04 |
JP3546887B2 (ja) | 2004-07-28 |
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