Patents by Inventor Yasuo Kitajima
Yasuo Kitajima 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: 11650548Abstract: Provided is a watch, including: an exterior case having electroconductivity; an operating member having electroconductivity, which is inserted into the exterior case through an opening formed through the exterior case, and which is configured to accept an operation performed by a user; and an electrostatic motor including: an electret substrate having an electret surface on which electret films being electrically charged are provided; a counter substrate, on which electrodes to be arranged so as to be opposed to the electret films are provided; and a rotary shaft configured to rotate the electret substrate and the counter substrate relative to each other, wherein the operating member and the exterior case are electrically continuous with each other via a conduction path formed so as to avoid overlapping with the electret surface in plan view.Type: GrantFiled: March 11, 2020Date of Patent: May 16, 2023Assignee: CITIZEN WATCH CO., LTD.Inventors: Kenji Shimoda, Yasuo Kitajima, Daisuke Tokunaga, Shinnosuke Sakata, Koki Mine, Yuta Furudate, Kazutaka Igarashi
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Patent number: 11567454Abstract: Provided is an electromechanical transducer to be detachably attached to an electronic device, the transducer including: first and second plates; a rotor rotating around a rotating shaft supported by the plates; a fixed substrate disposed between the plates and facing the rotor; a charged portion having sub-regions disposed on the rotor at intervals in a rotating direction thereof so as to face the fixed substrate; an opposing electrode disposed on the fixed substrate so as to face the rotor; an adjusting unit for adjusting sliding properties of the rotating shaft, the adjusting unit being provided for at least one of the plates; and a gear train coupled to the rotating shaft. The gear train transmits motive power generated by the rotor rotated by electric power of the electronic device to the electronic device or transmits motive power generated by a change in orientation of the electronic device to the rotor.Type: GrantFiled: December 21, 2019Date of Patent: January 31, 2023Assignee: CITIZEN WATCH CO., LTD.Inventors: Yasuo Kitajima, Kenji Shimoda, Shinnosuke Sakata, Daisuke Tokunaga
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Patent number: 11101748Abstract: Provided is a method of manufacturing an electrostatic induction transducer, the method including: providing a conductive substrate; providing a first electret material film on a first surface of the conductive substrate; providing a second electret material film on a second surface of the conductive substrate; forming a through hole that penetrates the conductive substrate, the first electret material film, and the second electret material film; mounting a supported member being conductive to the conductive substrate while allowing the conductive substrate to move in an in-plane direction; and applying charges to the first electret material film and the second electret material film by a charging process.Type: GrantFiled: October 29, 2019Date of Patent: August 24, 2021Assignee: CITIZEN WATCH CO., LTD.Inventors: Toshinari Maeda, Makoto Watanabe, Yasuo Kitajima, Izumi Yamamoto
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Publication number: 20200293000Abstract: Provided is a watch, including: an exterior case having electroconductivity; an operating member having electroconductivity, which is inserted into the exterior case through an opening formed through the exterior case, and which is configured to accept an operation performed by a user; and an electrostatic motor including: an electret substrate having an electret surface on which electret films being electrically charged are provided; a counter substrate, on which electrodes to be arranged so as to be opposed to the electret films are provided; and a rotary shaft configured to rotate the electret substrate and the counter substrate relative to each other, wherein the operating member and the exterior case are electrically continuous with each other via a conduction path formed so as to avoid overlapping with the electret surface in plan view.Type: ApplicationFiled: March 11, 2020Publication date: September 17, 2020Inventors: Kenji SHIMODA, Yasuo KITAJIMA, Daisuke TOKUNAGA, Shinnosuke SAKATA, Koki MINE, Yuta FURUDATE, Kazutaka IGARASHI
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Publication number: 20200209809Abstract: Provided is an electromechanical transducer to be detachably attached to an electronic device, the transducer including: first and second plates; a rotor rotating around a rotating shaft supported by the plates; a fixed substrate disposed between the plates and facing the rotor; a charged portion having sub-regions disposed on the rotor at intervals in a rotating direction thereof so as to face the fixed substrate; an opposing electrode disposed on the fixed substrate so as to face the rotor; an adjusting unit for adjusting sliding properties of the rotating shaft, the adjusting unit being provided for at least one of the plates; and a gear train coupled to the rotating shaft. The gear train transmits motive power generated by the rotor rotated by electric power of the electronic device to the electronic device or transmits motive power generated by a change in orientation of the electronic device to the rotor.Type: ApplicationFiled: December 21, 2019Publication date: July 2, 2020Inventors: Yasuo Kitajima, Kenji Shimoda, Shinnosuke Sakata, Daisuke Tokunaga
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Publication number: 20200144937Abstract: Provided is a method of manufacturing an electrostatic induction transducer, the method including: providing a conductive substrate; providing a first electret material film on a first surface of the conductive substrate; providing a second electret material film on a second surface of the conductive substrate; forming a through hole that penetrates the conductive substrate, the first electret material film, and the second electret material film; mounting a supported member being conductive to the conductive substrate while allowing the conductive substrate to move in an in-plane direction; and applying charges to the first electret material film and the second electret material film by a charging process.Type: ApplicationFiled: October 29, 2019Publication date: May 7, 2020Inventors: Toshinari MAEDA, Makoto WATANABE, Yasuo KITAJIMA, Izumi YAMAMOTO
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Patent number: 10579019Abstract: A watch including: a first drive mechanism including a hand having a rotational axis along a first direction, a wheel train, and a drive power source; and a second drive mechanism including a hand having a rotational axis along a second direction different from the first direction, a wheel train, and a drive power source, wherein the first drive mechanism and the second drive mechanism are mounted separately. Each of the first direction and the second direction is defined along a normal direction to dial at a position of a rotational axis of the hand.Type: GrantFiled: January 28, 2016Date of Patent: March 3, 2020Assignee: Citizen Watch Co., LTD.Inventors: Yasuo Kitajima, Hiroyuki Takahashi, Kyohei Miyajima, Yuichi Naito
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Publication number: 20190064740Abstract: A watch comprises: a first drive mechanism including a hand having a rotational axis along a first direction, a wheel train, and a drive power source; and a second drive mechanism including a hand having a rotational axis along a second direction different from the first direction, a wheel train, and a drive power source, wherein the first drive mechanism and the second drive mechanism are mounted separately. Each of the first direction and the second direction is defined along a normal direction to dial at a position of a rotational axis of the hand.Type: ApplicationFiled: January 28, 2016Publication date: February 28, 2019Applicant: Citizen Watch Co., Ltd.Inventors: Yasuo KITAJIMA, Hiroyuki TAKAHASHI, Kyohei MIYAJIMA, Yuichi NAITO
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Publication number: 20070103617Abstract: A shield member that shields both of or one of an electricity and a magnetism is provided between a circuit board and a display panel arranged to be superposed on the circuit board. A holding portion that holds a lighting device is formed on one side of that shield member. The lighting device stored in this holding portion is positioned relative to a side surface of the display panel.Type: ApplicationFiled: December 21, 2006Publication date: May 10, 2007Inventors: Yasuo Kitajima, Yuichi Kato, Yuichi Hasumi
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Publication number: 20050117087Abstract: A shield member that shields both of or one of an electricity and a magnetism is provided between a circuit board and a display panel arranged to be superposed on the circuit board. A holding portion that holds a lighting device is formed on one side of this shield member. The lighting device stored in this holding portion is positioned relative to a side surface of the display panel.Type: ApplicationFiled: October 13, 2004Publication date: June 2, 2005Inventors: Yasuo Kitajima, Yuichi Kato, Yuichi Hasumi
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Patent number: 6477114Abstract: An electronic timepiece has a calendar advancement device resistant to external shock and capable of achieving date correction in a short time. A date dial advancement transducer (51) is activated in response to a date dial drive signal generated by a 24-hour switch. A date advancement mechanism (a date gear train) (52) employs a Geneva wheel for stabilizing the date dial (70). A bounding restraint lever is regulated using an eccentric cam or the like provided coaxially with the Geneva wheel.Type: GrantFiled: August 26, 1999Date of Patent: November 5, 2002Assignee: Citizen Watch Co., Ltd.Inventors: Takeo Mutoh, Yasuo Kitajima, Haruhiko Higuchi, Hiroyuki Koike
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Patent number: 6385136Abstract: An electronic timepiece is provided with a device for automatically adjusting month-end calendar dates capable of reading dates simply, quickly, and reliably. A date detection pattern 71 composed of reflective and non-reflective sections is formed on the rear surface of a date dial 70. When the date dial 70 rotates, a change in the boundary between the reflective part and the non-reflective part is read by a photo sensor 81, the necessary number of dates is determined by a control circuit 20 by use of a perpetual calendar circuit, driving a date dial driving mechanisms 51 and 52.Type: GrantFiled: May 4, 2001Date of Patent: May 7, 2002Assignee: Citizen Watch Co., Ltd.Inventors: Haruhiko Higuchi, Takeo Mutoh, Yasuo Kitajima, Hiroyuki Koike
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Publication number: 20010028605Abstract: An electronic timepiece is provided with a device for automatically adjusting month-end calendar dates capable of reading dates simply, quickly, and reliably.Type: ApplicationFiled: May 4, 2001Publication date: October 11, 2001Applicant: CITIZEN WATCH CO., LTD.Inventors: Haruhiko Higuchi, Takeo Mutoh, Yasuo Kitajima, Hiroyuki Koike
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Patent number: 6278661Abstract: An electronic timepiece is provided with a device for automatically adjusting month-end calendar dates capable of reading dates simply, quickly, and reliably. A date detection pattern 71 composed of reflective and non-reflective sections is formed on the rear surface of a date dial 70. When the date dial 70 rotates, a change in the boundary between the reflective part and the non-reflective part is read by a photo sensor 81, the necessary number of dates is determined by a control circuit 20 by use of a perpetual calendar circuit, driving a date dial driving mechanisms 51 and 52.Type: GrantFiled: August 25, 1999Date of Patent: August 21, 2001Assignee: Citizen Watch Co., Ltd.Inventors: Haruhiko Higuchi, Takeo Mutoh, Yasuo Kitajima, Hiroyuki Koike
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Patent number: 6240052Abstract: To provide an electronic watch with calendar without the need to adjust the calendar when the watch is restarted. A control mechanism 133 is provided which uses a signal from a 24-hour switch 12 which operates in synchronism with a time mechanism converter 6 as a signal for operating a date display drive converter 51 during normal watch operation, and uses a signal from a 24-hour counter which receives a signal from a time mechanism circuit 60 as a signal for operating the date display drive converter 51 at other times.Type: GrantFiled: December 18, 1998Date of Patent: May 29, 2001Assignee: Citizen Watch Co., Ltd.Inventors: Yasuo Kitajima, Takeo Mutoh, Haruhiko Higuchi, Hiroyuki Koike
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Patent number: 6040335Abstract: Compounds represented by the general formula (I) or pharmacologically acceptable salts thereof: ##STR1## (where R is a group --NHCHR.sub.1 R.sub.2, --N(CHR.sub.1 R.sub.2).sub.2, --N(CHR.sub.1 R.sub.2)CHR.sub.3 R.sub.4, --N.sup.+ (CHR.sub.1 R.sub.2).sub.3, --N.sup.+ (CHR.sub.1 R.sub.2).sub.2 CHR.sub.3 R.sub.4 or --N.sup.+ (CHR.sub.1 R.sub.2)(CHR.sub.3 R.sub.4)CHR.sub.5 R.sub.6 (where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, are each a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or an aralkyl group, or an alkyl, alkenyl, aryl or aralkyl group which is substituted by at least one substituent selected from the group consisting of a halogen atom, a hydroxyl group, a lower alkoxy group, a lower alkylacyloxy group, a lower alkylacyl group, a lower alkoxycarbonyl group, a nitro group, a cyano group and a heterocyclic group, with CHR.sub.1 R.sub.2, CHR.sub.3 R.sub.4 or CHR.sub.5 R.sub.Type: GrantFiled: July 31, 1997Date of Patent: March 21, 2000Assignee: Suntory LimitedInventors: Masayuki Saitoh, Yasuo Kitajima, Norio Iwasawa, Kenju Miura, Munetada Haruyama, Junko Hashino
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Patent number: 5966344Abstract: A light transmitting metallic dial 50 is disposed above a cell 2 such as an EL device, a solar battery, or the like and the light transmitting type metallic dial 50 is secured by engaging an aligning portion 50b formed on the light transmitting type metallic dial 50 with an aligning portion 4b formed on a casing frame 4. In the light transmitting type metallic dial 50, light transmitting holes 50a and 51 constituting various characters, numerals, patterns, and the like are formed. Further, when the transparent plate is laminated on the light transmitting metallic dial 50, a clearance 7 is formed between the cell 2 and the transparent plate 5 using a spacer or the like.Type: GrantFiled: August 26, 1997Date of Patent: October 12, 1999Assignee: Citizen Watch Co., Ltd.Inventors: Toshio Umemoto, Masami Fukuda, Kenji Shimoda, Yasuo Kitajima, Isamu Kobayashi, Yoshio Katsuki, Yurie Udoh
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Patent number: 5898646Abstract: A watch has a watch case and a module mounted in the watch case. A dial of the watch is welded to the watch case, and a shield is also welded to the dial for shielding the dial.Type: GrantFiled: October 9, 1996Date of Patent: April 27, 1999Assignee: Citizen Watch Co., Ltd.Inventors: Masahiro Kasaya, Yasuo Kitajima, Takayuki Hasumi
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Patent number: 5703837Abstract: A light transmitting type display plate 5 is arranged above a cell 2 such as an EL element or a solar cell or the like, and the display plate 5 is fixed to the support member 4 through the engagement of a positioning section 5b formed on the light transmitting type display plate 5 with a positioning section 4b formed on a support member 4. In the case where the light transmitting type display plate is a transparent plate 5, a spacer 6 or the like forms a gap 7 between the cell 2 and the transparent plate 5.Type: GrantFiled: November 15, 1995Date of Patent: December 30, 1997Assignee: Citizen Watch Co., Ltd.Inventors: Toshio Umemoto, Masami Fukuda, Kenji Shimoda, Yasuo Kitajima, Isamu Kobayashi, Yurie Udou
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Patent number: 5592443Abstract: A watch has a watch case, a module mounted in the watch case, a dial secured to the watch case, and a shield for shielding the dial. The dial has an extending portion outwardly extending from the dial. The dial is secured to the watch case, and the shield is secured to the dial.Type: GrantFiled: November 29, 1994Date of Patent: January 7, 1997Assignee: Citizen Watch Co., Ltd.Inventors: Masahiro Kasaya, Yasuo Kitajima, Takayuki Hasumi