Patents by Inventor Hiroko Nakayama
Hiroko Nakayama 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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Publication number: 20240127189Abstract: Provided is a work management device including an acquisition unit that acquires information indicating login to a system using a first terminal and an operation history of the first terminal occurring after login to the system, a specifying unit that specifies a non-operation period of a terminal from the operation history of the first terminal, and a calculation unit that calculates working hours including the non-operation period of the terminal according to a length of the non-operation period of the terminal.Type: ApplicationFiled: December 22, 2023Publication date: April 18, 2024Applicant: NEC CorporationInventors: Kazuki MAEDA, Hiroko Imai, Mitsuhiro Nakayama
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Publication number: 20240127190Abstract: Provided is a work management device including an acquisition unit that acquires information indicating login to a system using a first terminal and an operation history of the first terminal occurring after login to the system, a specifying unit that specifies a non-operation period of a terminal from the operation history of the first terminal, and a calculation unit that calculates working hours including the non-operation period of the terminal according to a length of the non-operation period of the terminal.Type: ApplicationFiled: December 27, 2023Publication date: April 18, 2024Applicant: NEC CorporationInventors: Kazuki MAEDA, Hiroko Imai, Mitsuhiro Nakayama
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Publication number: 20240112146Abstract: Provided is a work management device including an acquisition unit that acquires information indicating login to a system using a first terminal and an operation history of the first terminal occurring after login to the system, a specifying unit that specifies a non-operation period of a terminal from the operation history of the first terminal, and a calculation unit that calculates working hours including the non-operation period of the terminal according to a length of the non-operation period of the terminal.Type: ApplicationFiled: September 22, 2023Publication date: April 4, 2024Applicant: NEC CorporationInventors: Kazuki MAEDA, Hiroko IMAI, Mitsuhiro NAKAYAMA
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Patent number: 11365154Abstract: A silicon nitride-based sintered body containing silicon nitride-based grains, which are silicon nitride grains or sialon grains. In the silicon nitride-based sintered body, when the size of each silicon nitride-based grain is represented by its maximum grain size, the ratio of the number of silicon nitride-based grains having a maximum grain size of 1 ?m or less to the number of the entire silicon nitride-based grains is 70% or higher. Furthermore, in the distribution profile of no. % of silicon nitride-based grains with respect to maximum grain size, the maximum value of no. % (i.e., maximum no. %) of silicon nitride-based grains is 15 no. % or higher. Also disclosed is a cutting insert, which is formed of the silicon nitride-based sintered body.Type: GrantFiled: March 30, 2017Date of Patent: June 21, 2022Assignee: NGK SPARK PLUG CO., LTD.Inventors: Hiroko Nakayama, Atsushi Komura
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Publication number: 20210155550Abstract: A silicon nitride-based sintered body containing silicon nitride-based grains, which are formed of sialon grains. In the silicon nitride-based sintered body, when the size of each silicon nitride-based grain is represented by its maximum grain size, the ratio of the number of silicon nitride-based grains having a maximum grain size of 1 ?m or less to the number of the entire silicon nitride-based grains is 70% or higher. Furthermore, in the distribution profile of no. % of silicon nitride-based grains with respect to maximum grain size, the maximum value of no. % (i.e., maximum no. %) of silicon nitride-based grains is 15 no. % or higher. Also disclosed is a cutting insert, which is formed of the silicon nitride-based sintered body.Type: ApplicationFiled: February 5, 2021Publication date: May 27, 2021Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroko NAKAYAMA, Atsushi KOMURA
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Publication number: 20200299199Abstract: A silicon nitride-based sintered body containing silicon nitride-based grains, which are silicon nitride grains or sialon grains. In the silicon nitride-based sintered body, when the size of each silicon nitride-based grain is represented by its maximum grain size, the ratio of the number of silicon nitride-based grains having a maximum grain size of 1 ?m or less to the number of the entire silicon nitride-based grains is 70% or higher. Furthermore, in the distribution profile of no. % of silicon nitride-based grains with respect to maximum grain size, the maximum value of no. % (i.e., maximum no. %) of silicon nitride-based grains is 15 no. % or higher. Also disclosed is a cutting insert, which is formed of the silicon nitride-based sintered body.Type: ApplicationFiled: March 30, 2017Publication date: September 24, 2020Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroko NAKAYAMA, Atsushi KOMURA
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Patent number: 8808414Abstract: The present invention provides a technique of improving wear resistance of a Sialon sintered body. The Sialon sintered body has a Sialon phase including at least a ?-Sialon and a 12H-Sialon among an ?-Sialon, the ?-Sialon and the 12H-Sialon. A ratio of a second Sialon total content, which is a sum of the contents of the ?-Sialon and the 12H-Sialon, to a first Sialon total content, which is a sum of contents of the ?-Sialon, the ?-Sialon and the 12H-Sialon, is greater than 20% and not greater than 55%, and a ratio of the content of the 12H-Sialon to the first Sialon total content is not less than 2% and not greater than 55%.Type: GrantFiled: March 11, 2010Date of Patent: August 19, 2014Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroko Nakayama, Ryoji Toyoda
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Publication number: 20120066981Abstract: The present invention provides a technique of improving wear resistance of a Sialon sintered body. The Sialon sintered body has a Sialon phase including at least a ?-Sialon and a 12H-Sialon among an ?-Sialon, the ?-Sialon and the 12H-Sialon. A ratio of a second Sialon total content, which is a sum of the contents of the ?-Sialon and the 12H-Sialon, to a first Sialon total content, which is a sum of contents of the ?-Sialon, the ?-Sialon and the 12H-Sialon, is greater than 20% and not greater than 55%, and a ratio of the content of the 12H-Sialon to the first Sialon total content is not less than 2% and not greater than 55%.Type: ApplicationFiled: March 11, 2010Publication date: March 22, 2012Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hiroko Nakayama, Ryoji Toyoda
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Publication number: 20110239363Abstract: An automatic hair washing machine including a sink in which a head portion of a user is laid, the sink having an enclosed space that is formed when the head portion is laid in the sink, a nozzle link unit for jetting liquid containing at least one of washing water and cleaning agent liquid, and a mist spraying unit for spraying mist into the enclosed space.Type: ApplicationFiled: March 25, 2011Publication date: October 6, 2011Applicants: SANYO ELECTRIC CO., LTD., SANYO AQUA CORPORATION, TAKARA BELMONT CORPORATIONInventors: Shuhei Nagamatsu, Akira Yamaguchi, Masashi Furusawa, Kazushige Murakami, Masaru Iwasaki, Kazuhide Yamamoto, Mayumi Okazaki, Hiroko Nakayama, Yosuke Shimizu
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Patent number: 7951737Abstract: A cutting insert 1 is made of an aluminum oxide-based composite sintered body constituted by a ternary ceramic material including aluminum oxide, silicon carbide, and a sialon. The sialon in the aluminum oxide-based composite sintered body is Si—Al—O—N as defined by JCPDS No. 32-0026 in X-ray diffraction analysis.Type: GrantFiled: August 29, 2007Date of Patent: May 31, 2011Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroko Nakayama, Kazuhiro Urashima
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Publication number: 20090197073Abstract: A cutting insert 1 is made of an aluminum oxide-based composite sintered body constituted by a ternary ceramic material including aluminum oxide, silicon carbide, and a sialon. The sialon in the aluminum oxide-based composite sintered body is Si—Al—O—N as defined by JCPDS No. 32-0026 in X-ray diffraction analysis.Type: ApplicationFiled: August 29, 2007Publication date: August 6, 2009Inventors: Hiroko Nakayama, Kazuhiro Urashima