Patents by Inventor Tsuneji Takasugi
Tsuneji Takasugi 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: 6924429Abstract: A method for producing an electronic element comprising a housing composed of an insulating ceramic substrate and a lid member covering a surface of the ceramic substrate, with at least one electronic element being mounted inside the housing. After preparing a plate-like ceramic substrate by baking a composite containing inorganic powders and a binder, the ceramic substrate is shaped in accordance with a predetermined design of the device, a metalized layer is formed on a surface of the shaped ceramic substrate, an electronic element is mounted in a predetermined area of the ceramic substrate, and the ceramic substrate is sealed with the lid member.Type: GrantFiled: August 16, 2002Date of Patent: August 2, 2005Assignee: Citizen Watch Co., Ltd.Inventors: Takao Kasai, Makoto Wakasugi, Tsuneji Takasugi
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Publication number: 20040017004Abstract: A method for producing an electronic element comprising a housing composed of an insulating ceramic substrate and a lid member covering a surface of the ceramic substrate, with at least one electronic element being mounted inside the housing. After preparing a plate-like ceramic substrate by baking a composite containing inorganic powders and a binder, the ceramic substrate is shaped in accordance with a predetermined design of the device, a metalized layer is formed on a surface of the shaped ceramic substrate, an electronic element is mounted in a predetermined area of the ceramic substrate, and the ceramic substrate is sealed with the lid member.Type: ApplicationFiled: April 8, 2003Publication date: January 29, 2004Inventors: Takao Kasai, Makoto Wakasugi, Tsuneji Takasugi
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Patent number: 4659897Abstract: A method of making a watchcase, in which two projections are formed on a joining surface of a part of the watchcase, such as a band connecting lug. The part is joined to another part such as a case body by projection welding to make the watchcase.Type: GrantFiled: January 28, 1986Date of Patent: April 21, 1987Assignee: Citizen Watch Co., Ltd.Inventor: Tsuneji Takasugi
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Patent number: 4496248Abstract: A structure of a watch case, which comprises a watchglass, a case band member composed of a cemented carbide alloy and having a flange formed at an upper portion thereof and an annular surface formed at a lower portion of the flange, a watchglass supporting ring brazed to the case band member and having an upper surface for supporting a bottom surface of the watchglass, a packing for providing a waterproof and a back cover secured to the case band member. The packing is provided between the outer periphery of the watchglass and an annular groove. The annular groove is formed by the flange and annular surface of the case band member and the upper surface of the watchglass supporting ring.Type: GrantFiled: January 26, 1982Date of Patent: January 29, 1985Assignee: Citizen Watch Company LimitedInventors: Masahiko Waki, Seiji Umezawa, Tsuneji Takasugi, Hiroshi Koide, Takao Kasai
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Patent number: 4444719Abstract: This gold solder comprises an Au-Cu-Ag-Ge alloy with 3 to 6% germanium and has a melting temperature of 800.degree. C. or below. The gold content of the gold solder is 50 to 70% equivalent to 12 to 16 Karat. The gold solder that exhibits corrosion resistance corresponding to that of materials such as a gold alloy, stainless steel, stellite and sintered carbide makes it possible to solder at 800.degree. C. or below ornamental parts made of the above materials. As a result, any surface degradation is prevented during the soldering process of mirror-polished ornamental parts.Type: GrantFiled: February 16, 1983Date of Patent: April 24, 1984Assignee: Citizen Watch Co., Ltd.Inventors: Yosuke Sakakibara, Takao Kasai, Tsuneji Takasugi
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Patent number: 4419409Abstract: The polyhedral body of aluminum such as a watch case obtained by the inventive method is colored in two different colors on different polyhedral faces demarcated by the ridgeline therebetween with remarkable decisiveness not obtained in the prior art methods. The inventive method utilizes anodization and coloring by dyeing in two steps. A part of the polyhedral faces anodized and colored in a dark color in the first step is ground to expose the bare surface of aluminum, which is then activated by dipping in an aqueous acid solution and again anodized by applying an unconventionally high voltage in an electrolyte bath of a specific composition followed by coloring in a light color decoratively distinguishable from the dark color imparted in the first step coloring.Type: GrantFiled: September 16, 1982Date of Patent: December 6, 1983Assignee: Citizen Watch Co. Ltd.Inventors: Machiro Kushida, Tsuneji Takasugi, Kenji Irie
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Patent number: 4408900Abstract: A joint structure of a watch body and a bezel comprising a watch body with a joint surface, a bezel with a joint surface, at least one projection extending from one of the joint surfaces welded onto the other surface, a space between said surfaces and connecting material filling said space. By thus constructing, the watch body and bezel have a durable water and air tight joint.Type: GrantFiled: April 17, 1981Date of Patent: October 11, 1983Assignee: Citizen Watch Company LimitedInventors: Tsuneji Takasugi, Seiji Umezawa
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Patent number: 4382172Abstract: A method for fabricating a watch case comprising the steps of placing contact points of a bezel and a watch body to face to each other, applying pressure to said contact points through electrodes, and applying pulse current to said electrodes until said contact points get molten. The pulse current will allow the bezel and the body except the contact points to cool down during its intervals. Therefore, this method does not require a water-cooling system as required by conventional methods.Type: GrantFiled: April 17, 1981Date of Patent: May 3, 1983Assignee: Citizen Watch Co., Ltd.Inventors: Tsuneji Takasugi, Seiji Umezawa
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Patent number: 4375391Abstract: The polyhedral body of aluminum such as a watch case obtained by the inventive method is colored in two different colors on different polyhedral faces demarcated by the ridgeline therebetween with remarkable decisiveness not obtained in the prior art methods. The inventive method utilizes anodization and coloring by dyeing in two steps. A part of the polyhedral faces anodized and colored in a dark color in the first step is ground to expose the bare surface of aluminum, which is then activated by dipping in an aqueous acid solution and again anodized by applying an unconventionally high voltage in an electrolyte bath of a specific composition followed by coloring in a light color decoratively distinguishable from the dark color imparted in the first step coloring.Type: GrantFiled: February 13, 1981Date of Patent: March 1, 1983Assignee: Citizen Watch Co., Ltd.Inventors: Hachiro Kushida, Tsuneji Takasugi, Kenji Irie
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Patent number: 4084990Abstract: A method for the fabrication of a decorative panel having a coarse, enlarged crystalline pattern characterized by applying a large rolling force at a draft ratio in excess of the critical draft ratio to a metal sheet; annealing the metal sheet at a temperature in excess of the recrystallization temperature in order to remove deformations caused by the rolling step; applying a prescribed pattern-like strain figures thereto; annealing the metal sheet in an anti-oxidizing atmosphere at a high temperature in excess of the recrystallization temperature in order to allow coarse, enlarged crystals to form; and subsequently etching the surface of the sheet.Type: GrantFiled: December 20, 1976Date of Patent: April 18, 1978Assignee: Citizen Watch Company LimitedInventors: Kisuke Watanabe, Tsuneji Takasugi
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Patent number: 3963589Abstract: The invention concerns a process for the manufacture of a decorative aluminum alloy product such as a watch case. In the first step, several aluminum sheets are united tightly into a stock by their overlapping and pressure-welding. The compacted stock is subjected to a forging step for agitating substantial part of the composite stock in its regularly laminated structure. Then, a watch case material is punched out from the composite stock which is further subjected to an anodically oxidizing step and a mirror finish step to provide the final product. The invention relates also the thus finished final product, having an attractive and contrasted flow design pattern on its exposed surface and in any section thereof.Type: GrantFiled: December 28, 1973Date of Patent: June 15, 1976Assignee: Citizen Watch Co., Ltd.Inventors: Hachiro Kushida, Tsuneji Takasugi, Shinji Ikeda, Takashi Shiono