Patents by Inventor Chiaki Nakamura
Chiaki Nakamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7807333Abstract: To provide a development system for lithographic printing plate precursors using a neutral developer, capable of preventing the non-image area of the resulting printing plates from being stained. In developing a lithographic printing plate precursor with a neutral developer having a pH of from 5.8 to 8.6, ultrasonic waves and/or an electric current are imparted to the neutral developer.Type: GrantFiled: August 23, 2005Date of Patent: October 5, 2010Assignee: Eastman Kodak CompanyInventors: Koji Hayashi, Chiaki Nakamura, Eiji Hayakawa
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Publication number: 20070298350Abstract: To provide a development system for lithographic printing plate precursors using a neutral developer, capable of preventing the non-image area of the resulting printing plates from being stained. In developing a lithographic printing plate precursor with a neutral developer having a pH of from 5.8 to 8.6, ultrasonic waves and/or an electric current are imparted to the neutral developer.Type: ApplicationFiled: August 23, 2005Publication date: December 27, 2007Inventors: Koji Hayashi, Chiaki Nakamura, Eiji Hayakawa
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Patent number: 6809498Abstract: To provide a power supply apparatus that replaces a dry battery by detecting electric field energy in a free space, rectifying the energy, extracting the energy as electric power, and accumulating the electric power. In particular, there is provided a power supply apparatus that is useful for a portable electronic equipment. An electromagnetic energy conversion unit collects a radio wave propagating in the air and converts collected electromagnetic energy into electric power. A rectifying unit generates electric power having a DC waveform by rectifying electric power having an AC waveform and charges the rectified electric power having the DC waveform into a secondary battery. An electric load is supplied with the rectified electric power having the DC waveform or with electric power having a DC waveform discharged from the secondary battery.Type: GrantFiled: May 16, 2002Date of Patent: October 26, 2004Assignee: Seiko Instruments Inc.Inventors: Chiaki Nakamura, Kazuo Kato, Yutaka Saitoh, Kazuo Matsubara, Tsutomu Tanaka
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Patent number: 6798718Abstract: To make calibration of temperature compensation etc. of individual sensor timepieces straightforward, to carry out measurements of physical quantities by each type of sensor in a highly precise manner, to make setting of a time and date for implementing the original timepiece function of the sensor timepiece easy, and to reduce the number of erroneous settings. A sensor timepiece equipped with a pressure sensor 1 comprises calibration control means for controlling writing of detection values of the pressure sensor 1 to a storage unit 3 in synchronism with external environmental setting control means for controlling an external environment corresponding to physical quantities measured by the pressure sensor 1.Type: GrantFiled: January 18, 2002Date of Patent: September 28, 2004Assignee: Seiko Instruments Inc.Inventors: Hiroyuki Masaki, Chiaki Nakamura
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Patent number: 6758816Abstract: There is provided a pulse wave detector enabling pulse wave detection with reduced power consumption, and prolonged usage time. Ultrasonic waves having a frequency of 10 MHz are transmitted from a transmitter towards an artery, and reflected waves that have undergone frequency modulation as a result of the Doppler effect of the artery are received by a receiver, pulse waves are extracted by FM detection, and a pulse rate is counted and displayed. Transmission of ultrasonic waves by the transmitter and reception of reflected waves by the receiver are carried intermittently at a frequency of 64 Hz to reduce the power consumption, to enable installation even in a small portable device with low battery capacity such as a watch, and to enable prolonged usage time.Type: GrantFiled: April 26, 2000Date of Patent: July 6, 2004Assignee: Seiko Instruments Inc.Inventors: Keisuke Tsubata, Hiroshi Odagiri, Chiaki Nakamura, Kazumi Sakumoto, Masataka Shinogi, Takashi Kamimoto
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Publication number: 20020190689Abstract: To provide a power supply apparatus that replaces a dry battery by detecting electric field energy in a free space, rectifying the energy, extracting the energy as electric power, and accumulating the electric power. In particular, there is provided a power supply apparatus that is useful for a portable electronic equipment. An electromagnetic energy conversion unit collects a radio wave propagating in the air and converts collected electromagnetic energy into electric power. A rectifying unit generates electric power having a DC waveform by rectifying electric power having an AC waveform and charges the rectified electric power having the DC waveform into a secondary battery. An electric load is supplied with the rectified electric power having the DC waveform or with electric power having a DC waveform discharged from the secondary battery.Type: ApplicationFiled: May 16, 2002Publication date: December 19, 2002Inventors: Chiaki Nakamura, Kazuo Kato, Yutaka Saitoh, Kazuo Matsubara, Tsutomu Tanaka
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Patent number: 6371920Abstract: A pulse wave monitor having a structure capable of automatically performing optimal positioning of a pulse wave probe with respect to a user's body. A plurality of transmitting piezoelectric vibrators for transmitting an ultrasonic wave to an artery are provided along with a plurality of receiving piezoelectric vibrators for receiving an ultrasonic wave from the artery. An optimal combination of a transmitting piezoelectric vibrator and a receiving piezoelectric vibrator for use in pulse wave measurement is determined based on the intensity of a received ultrasonic wave signal. Ultrasonic wave transmission and reception are made by the optimal combination so that accurate pulse wave detection measurement is made possible by automatic positioning of the pulse wave probe.Type: GrantFiled: April 18, 2000Date of Patent: April 16, 2002Assignee: Seiko Instruments Inc.Inventors: Takashi Kamimoto, Masataka Shinogi, Hiroshi Odagiri, Kazumi Sakumoto, Keisuke Tsubata, Chiaki Nakamura
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Patent number: 6295248Abstract: The timing of a tide is calculated depending on a user-selected geographic region and calendar date. Tide data is stored in memory for each geographic region available for selection by the user. The timing of a tide is calculated by determining first and second tide level data using a tide level estimating equation. The first tide level data is dependent on the selected calendar date and the stored tide data that corresponds to the selected geographic region. The second tide level data having a time interval that is shorter in duration than a time interval of the first tide level is determined data again using the tide level estimating equation. The timing that a tide corresponding to the selected geographic region and calendar date occurs is then calculated dependent on the second tide level data. Thus, an accurate calculation of the timing of a desired tide is obtained for the user-selected geographic region and calendar date.Type: GrantFiled: June 8, 1999Date of Patent: September 25, 2001Assignee: Seiko Instruments Inc.Inventor: Chiaki Nakamura
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Patent number: 6246362Abstract: A GPS signal receiving section measures a Doppler frequency of a carrier wave to output a three-dimensional velocity vector to a CPU 100. The CPU 100 calculates a cumulative distance from a signal receiving interval and velocity data to compare between the cumulative distance stored in a RAM 104 and the distance point data previously stored in the RAM 104. Where the cumulative distance exceeds the distance point data, a lap time is calculated and displayed on a display section 106 based on the time count data sent from the time count circuit 105. Further, the CPU 100 calculates and displays on the display section 106 a time to arrive at the predetermined moving distance from the velocity data, the cumulative distance and the predetermined moving distance stored in the RAM 104.Type: GrantFiled: March 24, 1998Date of Patent: June 12, 2001Assignee: Seiko Instruments Inc.Inventors: Keisuke Tsubata, Hiroshi Odagiri, Chiaki Nakamura, Kazumi Sakumoto
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Patent number: 6226594Abstract: A tide meter for calculating a spring tide day. First, a moon age value is determined depending on a designated calendar. The moon age value includes at least one of the day of the new moon and the day of the full moon. Tidal data is stored that is specific for each geographic location, and this data is used in calculating the spring tide day for a selected geographic area. Since the time of the rising and falling of the tide depends on geographic location, simply calculating a spring tide day from the position of the moon and sun may not be accurate for a specific geographic location. Accordingly, the stored tidal data that corresponds to a selected geographic area is included in the spring tide day calculation. Thus, the accuracy of the spring tide day calculation is increased for the particular selected geographic area.Type: GrantFiled: June 8, 1999Date of Patent: May 1, 2001Assignee: Seiko Instruments Inc.Inventor: Chiaki Nakamura
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Patent number: 6155983Abstract: The present invention relates to a pulse wave detecting device for detecting pulse waves, and to a pulse measurer employing this pulse wave detecting device. The present invention addresses the problem of obtaining a pulse wave signal in which the noise components have been suitably removed from a pulse waveform, and of determining the pulse rate with high accuracy based on this pulse wave signal.The method for deriving the pulse wave signal and pulse rate is as follows.The pulse wave signal from pulse wave detecting sensor unit (30) is temporarily stored in buffer (503). When impulse noise is detected in the pulse wave signal in buffer (503) by impulse noise detecting means (505), the band pass for first digital filter (506) becomes a hill-shaped curve centered on the frequency corresponding to the preceding pulse rate, and impulse noise in the pulse wave signal output from buffer (503) is decreased.Type: GrantFiled: November 4, 1998Date of Patent: December 5, 2000Assignees: Seiko Epson Corporation, Seiko Instruments, Inc.Inventors: Tsukasa Kosuda, Chiaki Nakamura
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Patent number: 6129676Abstract: A movement rate monitor comprises extraction circuitry for extracting a selected movement frequency component from a power spectrum output of a movement sensor, and a movement rate calculation circuit for calculating movement rate in accordance with the extracted frequency component. A display device may be included to display the calculated movement rate.Type: GrantFiled: August 25, 1997Date of Patent: October 10, 2000Assignee: Seiko Instruments Inc.Inventors: Hiroshi Odagiri, Keisuke Tsubata, Chiaki Nakamura, Kazumi Sakumoto, Naokatsu Nosaka, Motomu Hayakawa
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Patent number: 6023662Abstract: In a measurement device and a measurement method for determining output values by analyzing the frequency of cyclically changing detection data, such as pulse count, the output value indicating a peak in the analysis result is corrected using side lobe values that appear on both sides of said peak, and an output value having higher precision than the output value indicating the peak value is derived, such that a value closer to the original output value of the detection data can be obtained. Because the measurement device and measurement method according to the invention can improve the precision of the output value without increasing the sampling count, highly precise output values such as pulse counts can be obtained at high speeds without extending the data fetch time.Type: GrantFiled: August 25, 1997Date of Patent: February 8, 2000Assignees: Seiko Epson Corporation, Seiko Instruments, Inc.Inventors: Motomu Hayakawa, Chiaki Nakamura
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Patent number: 6009375Abstract: There is disclosed a portable GPS (Global Positioning System) receiver carried by a user. The receiver measures the distance traveled by the user and the speed. In the prior art technique, if satellites cannot be captured, no measurements are made. To find the distance and speed accurately, the measurements have to be performed continuously, thus increasing the electric power consumed by the receiver. The inventive receiver once finds the speed from the Doppler frequencies of the carrier waves. Then, a first distance-calculating means finds the distance from the speed. A walk-detecting means detects walking. A step number-calculating means accumulates the number of steps taken in steps. A stride-calculating means finds the stride from the accumulated step number and from the found distance. Then, a second distance-calculating means finds the distance from the stride and from the accumulated number of steps. A speed-calculating means finds the speed.Type: GrantFiled: October 10, 1997Date of Patent: December 28, 1999Assignee: Seiko Instruments Inc.Inventors: Kazumi Sakumoto, Hiroshi Odagiri, Chiaki Nakamura, Keisuke Tsubata
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Patent number: 5926131Abstract: An improved GPS receiving apparatus may be worn on a user's arm and is not affected by the user's periodic arm swinging motion. A GPS signal receiver receives a GPS signal from GPS satellites, the receiver being mountable on a user's arm. A display is provided for displaying information based upon an output of the GPS signal receiver. An arm swing detecting circuit including an acceleration sensor detects the periodic swinging motion of the user's arm and outputs a corresponding periodic signal. A timing circuit sets a predetermined time during respective arm swing movements at which a GPS signal receiving operation will be performed based upon the periodic signal output by the arm swing detecting circuit. Operation timing of the GPS signal receiver is performed based on the output signal of the timing circuit so that a GPS signal receiving operation is performed at the same time during each cycle of periodic arm swinging motion to thereby cancel the effect of the periodic arm swinging motion.Type: GrantFiled: September 10, 1997Date of Patent: July 20, 1999Assignee: Seiko Instruments Inc.Inventors: Kazumi Sakumoto, Hiroshi Odagiri, Chiaki Nakamura, Keisuke Tsubata
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Patent number: 5908396Abstract: In order to be able to accurately measure pitch both during running and walking, the invention focuses on the fact that the second harmonic of the body movement can be detected at a high level during running and that the third harmonic of the body movement can be detected at a high level during walking, and is designed to be able to calculate pitch regardless of whether or not the user is running or walking, by using a high-level line spectrum appearing in the area that is at or above 100 times/minute, for example, as the reference wave, and by determining whether this reference wave is the second or third harmonic. Whether the reference wave is the second or third harmonic can be determined based on whether or not a high-level signal is present near a frequency that is 1/3 or 2/3 of the frequency of the reference wave, for example; and pitch can be calculated by determining that the reference wave is the second harmonic if no high-level signal is present in the above frequency band.Type: GrantFiled: August 1, 1997Date of Patent: June 1, 1999Assignees: Seiko Epson Corporation, Seiko Instruments, Inc.Inventors: Motomu Hayakawa, Chiaki Nakamura
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Patent number: 5905460Abstract: The system includes an antenna posture detecting device for detecting an antenna posture condition where it is apparently impossible to receive the wave, and a received signal operation controlling device for temporarily interrupting the wave receiving operation, in the case where it is impossible for the antenna to receive the wave, until the wave receiving operation is again possible.Type: GrantFiled: August 25, 1997Date of Patent: May 18, 1999Assignee: Seiko Instruments Inc.Inventors: Hiroshi Odagiri, Keisuke Tsubata, Takeshi Oono, Kazumi Sakumoto, Chiaki Nakamura
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Patent number: 5857465Abstract: A variable accuracy biosignal detector includes a biosignal detector for detecting a biosignal such as a pulse wave from a living body and supplies the detected signal to a biosignal analog-to-digital converter. The analog-to-digital converter converts the biosignal to digital biosignal data values and stores the data in a memory. An input switch generates a start signal. In response to the start signal, a timing signal generating circuit generates a timing signal used as a sampling signal for driving the analog-to-digital converter and changes the sampling frequency of the analog-to-digital converter progressively on a time series basis. A biosignal calculating circuit performs frequency domain analysis when the number of stored digital biosignal data values reaches a predetermined value. By progressively reducing the sampling frequency of the analog-to-digital converter, measured results can be quickly displayed, while the accuracy of the displayed results is progressively increased.Type: GrantFiled: August 15, 1995Date of Patent: January 12, 1999Assignees: Seiko Instruments Inc., Seiko Epson CorporationInventors: Chiaki Nakamura, Tsukasa Kosuda
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Patent number: 5795301Abstract: For the purpose of realizing a display method for a portable electronic measuring device that allows the user to know his condition more easily and in greater detail by making it easy for him to read the display of measured results even if the display device is limited in size due to its portability, a bar graph is displayed in dot display area (134) of liquid crystal display device (13) of the portable pulse measuring device which extends up at each time interval according to the absolute value of the pulse rate after the measurement of time is started and until the pulse rate reaches a prescribed range, and after the pulse rate reaches the prescribed range, a bar graph is displayed that extends in the positive direction or the negative direction at each time interval according to the difference from the prescribed reference pulse rate. When temporal changes in the pitch during running are displayed in dot display area (134), they are displayed in a segmented graph.Type: GrantFiled: August 6, 1996Date of Patent: August 18, 1998Assignees: Seiko Epson Corporation, Seiko Instruments, Inc.Inventors: Naoaki Yasukawa, Chiaki Nakamura
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Patent number: 5787054Abstract: To achieve a multiple function portable electronic device providing improved ease of use by enabling the operation of selected functions to be sustained even while replacing the battery, switch end 190 is pushed out from battery housing hole 509 to one side by battery 59 when battery 59 is loaded, and is pushed by spring member 197 into battery housing hole 509 inside watch case 11 of the wristwatch-type pulse wave measuring device when battery 59 is removed from battery housing hole 509 after removing the battery cover. Switch end 190 thus automatically inputs the terminal voltage of a backup capacitance element from signal input terminal 510 to the IC. This causes the wristwatch-type pulse wave measuring device to switch from the normal operating mode to an energy conservation mode.Type: GrantFiled: August 9, 1996Date of Patent: July 28, 1998Assignees: Seiko Epson Corporation, Seiko Instruments, Inc.Inventors: Naoaki Yasukawa, Chiaki Nakamura