Patents by Inventor Masao Sakuyama
Masao Sakuyama 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: 7408845Abstract: A radio correcting timepiece that can reduce the influence of a radio wave situation of the standard radio wave having time information according to an area, and can make a correction to the exact time in a shorter time is provided. The radio correcting timepiece comprises a signal receiving means (1) for receiving a standard radio wave and a timepiece means (2) for correcting and displaying time on the basis of the time information outputted from the signal receiving means. The signal receiving means (1) can receive plural standard radio waves and includes memory means (1I) which is able to store signal receiving order of the plural standard radio waves. Since the plural standard radio waves can be received, the influence of a radio wave situation according to an area can be reduced and a correction to the exact time can be made in a shorter time by using the standard radio wave transmitted every minute.Type: GrantFiled: September 10, 2002Date of Patent: August 5, 2008Assignee: Citizen Holdings Co., Ltd.Inventors: Takashi Ihara, Masao Sakuyama, Akinari Takada, Masaaki Namekawa
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Patent number: 6876602Abstract: A first voltage detector detects whether the voltage of a secondary cell has reached to 1.2V and a first timer counts a time duration for which the voltage is equal to or above 1.2V. If the time counted by the first timer reaches one hour, a second timer starts counting time for one hour. An amount of charge accumulated in the secondary cell is displays after counting of the one hour by the second timer is over. As a result, an accurate display of the amount of charge accumulated in the secondary cell can be achieved.Type: GrantFiled: February 19, 2003Date of Patent: April 5, 2005Assignee: Citizen Watch Co., Ltd.Inventors: Masakazu Ichikawa, Isao Kitazawa, Masao Sakuyama, Tomio Okigami
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Publication number: 20040202051Abstract: A radio correcting timepiece that can reduce the influence of a radio wave situation of the standard radio wave having time information according to an area, and can make a correction to the exact time in a shorter time is provided. The radio correcting timepiece comprises a signal receiving means (1) for receiving a standard radio wave and a timepiece means (2) for correcting and displaying time on the basis of the time information outputted from the signal receiving means. The signal receiving means (1) can receive plural standard radio waves and includes memory means (1I) which is able to store signal receiving order of the plural standard radio waves. Since the plural standard radio waves can be received, the influence of a radio wave situation according to an area can be reduced and a correction to the exact time can be made in a shorter time by using the standard radio wave transmitted every minute.Type: ApplicationFiled: February 27, 2004Publication date: October 14, 2004Inventors: Takashi Ihara, Masao Sakuyama, Akinari Takada, Masaaki Namekawa
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Patent number: 6754138Abstract: A data transmission/reception system for wrist-type electronic timepiece. The data transmission/reception system for electronic timepieces comprises a data transmission device for generating data signals, and an electronic timepiece that receives data signals from the data transmission device by utilizing a coil for driving the hands, wherein the electronic timepiece is provided with a timing signal-generating means which generates a timing signal, and the data transmission device is provided with a timing signal-receiving means which receives the timing signals output from said hand-driving coil and transmits data signals in synchronism with the timing signals that are received. The data are transmitted and received in an ordinary hand-moving state without halting the timepiece while the functions are being operated. Therefore, there is no need of adjusting the time after the operation of the functions.Type: GrantFiled: May 29, 2002Date of Patent: June 22, 2004Assignee: Citizen Watch Co., Ltd.Inventor: Masao Sakuyama
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Publication number: 20030235117Abstract: A first voltage detector detects whether the voltage of a secondary cell has reached to 1.2V and a first timer counts a time duration for which the voltage is equal to or above 1.2V. If the time counted by the first timer reaches one hour, a second timer starts counting time for one hour. An amount of charge accumulated in the secondary cell is displays after counting of the one hour by the second timer is over. As a result, an accurate display of the amount of charge accumulated in the secondary cell can be achieved.Type: ApplicationFiled: February 19, 2003Publication date: December 25, 2003Applicant: CITIZEN WATCH CO., LTD.Inventors: Masakazu Ichikawa, Isao Kitazawa, Masao Sakuyama, Tomio Okigami
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Patent number: 6522601Abstract: A data transmission/reception system for wrist-type electronic timepiece. The data transmission/reception system for electronic timepieces comprises a data transmission device for generating data signals, and an electronic timepiece that receives data signals from the data transmission device by utilizing a coil for driving the hands, wherein the electronic timepiece is provided with a timing signal-generating means which generates a timing signal, and the data transmission device is provided with a timing signal-receiving means which receives the timing signals output from said hand-driving coil and transmits data signals in synchronism with the timing signals that are received. The data are transmitted and received in an ordinary hand-moving state without halting the timepiece while the functions are being operated. Therefore, there is no need of adjusting the time after the operation of the functions.Type: GrantFiled: November 28, 1997Date of Patent: February 18, 2003Assignee: Citizen Watch Co., Ltd.Inventor: Masao Sakuyama
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Patent number: 6490230Abstract: An electronic watch with a meter function, capable of a multifunctional display, wherein the dial of the watch is divided into a data display region and a mode display region and the area for displaying the mode, and the area for displaying functional quantities are increased to make the graduations easier to read, with one hand indicating a data display region for data corresponding to physical quantities, and one hand indicating the mode region.Type: GrantFiled: April 14, 1993Date of Patent: December 3, 2002Assignee: Citizen Watch Co., Ltd.Inventors: Masao Sakuyama, Kenji Shimoda, Shinichi Yamada, Kenji Miyasaka, Nobuyuki Uehara, Noritoshi Suzuki
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Patent number: 6483781Abstract: A multifunction electronic watch 10 having a large variety of added functions, and providing an electronic watch and drive method therefor that have a high value as a product and a configuration enabling separate use of an energy-saving mode and a function information operating mode, this electronic watch 10 having a reference signal generation means 1, a time information generation means 2, which generates time information TJ based on a reference signal S3R from the reference signal generation means 1, a function information generation means for generating function information FJ, a display drive means 4, which outputs drive signals DRT and DRF for the purpose of displaying the function information FJ and the time information TJ on an appropriate display means, and a display means 5, which displays the function information FJ and the time information TJ based on the drive signals DRT and DRF from the display drive means 4, this electronic watch having an energy-saving operating condition with a power consumpType: GrantFiled: June 13, 2001Date of Patent: November 19, 2002Assignee: Citizen Watch Co., Ltd.Inventors: Kiyotaka Igarashi, Masao Sakuyama, Akiyoshi Murakami, Kenji Shimoda, Noritoshi Suzuki
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Publication number: 20020141290Abstract: A data transmission/reception system for wrist-type electronic timepiece. The data transmission/reception system for electronic timepieces comprises a data transmission device for generating data signals, and an electronic timepiece that receives data signals from the data transmission device by utilizing a coil for driving the hands, wherein the electronic timepiece is provided with a timing signal-generating means which generates a timing signal, and the data transmission device is provided with a timing signal-receiving means which receives the timing signals output from said hand-driving coil and transmits data signals in synchronism with the timing signals that are received. The data are transmitted and received in an ordinary hand-moving state without halting the timepiece while the functions are being operated. Therefore, there is no need of adjusting the time after the operation of the functions.Type: ApplicationFiled: May 29, 2002Publication date: October 3, 2002Applicant: CITIZEN WATCH CO., LTD.Inventor: Masao Sakuyama
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Publication number: 20020136092Abstract: A data transmission/reception system for wrist-type electronic timepiece. The data transmission/reception system for electronic timepieces comprises a data transmission device for generating data signals, and an electronic timepiece that receives data signals from the data transmission device by utilizing a coil for driving the hands, wherein the electronic timepiece is provided with a timing signal-generating means which generates a timing signal, and the data transmission device is provided with a timing signal-receiving means which receives the timing signals output from said hand-driving coil and transmits data signals in synchronism with the timing signals that are received. The data are transmitted and received in an ordinary hand-moving state without halting the timepiece while the functions are being operated. Therefore, there is no need of adjusting the time after the operation of the functions.Type: ApplicationFiled: November 28, 1997Publication date: September 26, 2002Applicant: CITIZEN WATCH CO., LTD.Inventor: MASAO SAKUYAMA
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Publication number: 20010043512Abstract: A multifunction electronic watch 10 having a large variety of added functions, and providing an electronic watch and drive method therefor that have a high value as a product and a configuration enabling separate use of an energy-saving mode and a function information operating mode, this electronic watch having 10 having a reference signal generation means 1, a time information generation means 2, which generates time information TJ based on a reference signal S3R from the reference signal generation means 1, a function information generation means for generating function information FJ, a display drive means 4, which outputs drive signals DRT and DRF for the purpose of displaying the function information FJ and the time information TJ on an appropriate display means, and a display means 5, which displays the function information FJ and the time information TJ based on the drive signals DRT and DRF from the display drive means 4, this electronic watch having an energy-saving operating condition with a powerType: ApplicationFiled: June 13, 2001Publication date: November 22, 2001Applicant: Citizen Watch Co., Ltd.Inventors: Kiyotaka Igarashi, Masao Sakuyama, Akiyoshi Murakami, Kenji Shimoda, Noritoshi Suzuki
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Patent number: 4516120Abstract: A display device incorporating an electrochromic display cell is provided with means whereby each segment electrode of the electrochromic display cell can be set into a completely electrically isolated state after a condition of coloration of a corresponding display element has been established. Since no leakage current is permitted to flow between the segment electrode and the drive transistors coupled thereto, a charge is stored on the segment electrode which maintains the coloration condition over a considerably longer period of time than has been possible hitherto, thus enabling an electrochromic display device to be realized having a very low level of power consumption.Type: GrantFiled: January 6, 1982Date of Patent: May 7, 1985Assignee: Citizen Watch Company LimitedInventor: Masao Sakuyama