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Shigeyasu Inoue, Hiroyoshi Yamamoto: Aqueous ink compositions for ball-point pens. United Kingdom Atomic Energy Authority, Larson and Taylor, October 8, 1985: US04545818 (47 worldwide citation)

An aqueous ink composition for ball-point pens which comprises (i) 84.5 to 99.7 parts by weight of an aqueous medium consisting of 40 to 95% by weight of water and 60 to 5% by weight of a wetting agent, (ii) 0.1 to 15 parts by weight of a water-soluble or water-dispersible coloring agent and (iii) 0 ...


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Masahiro Yasunaga, Shigeyasu Inoue: Liquid applicator. Sakura Color Products, Wood Phillips VanSanten Clark & Mortimer, January 20, 1998: US05709492 (27 worldwide citation)

A liquid applicator using a roller which is effectively prevented from being disengaged from the housing thereof. The liquid applicator provides very smooth flow of ink from the initial touch of drawing without generating a scratchy effect. The improved liquid applicator introduces a roller in place ...


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Hiroshi Inoue, Shigeyasu Inoue, Seishiro Ito: Pigment dispersion composition. Sakura Color Products Corporation, Armstrong Westerman Hattori McLeland & Naughton, December 17, 1996: US05585189 (17 worldwide citation)

The present invention discloses a pigment dispersion composition for depositing a multiplicity of pores existing in anodic oxide films formed on a surface of an aluminum or aluminum alloy material by way of electrophoresis for coloration, the pores being preliminarily enlarged to have a diameter of ...


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Shigeyasu Inoue, Tatsuya Ozu, Hiroyoshi Yamamoto: Device for preventing drying of ink in writing instrument. Sakura Color Products Corporation, Wenderoth Lind & Ponack, March 27, 1990: US04911571 (6 worldwide citation)

A device for preventing drying of ink in a writing instrument, in particular, a writing instrument provided with a tubular holder made of synthetic resin. The writing instrument is internally provided with a tubular ink-cartridge containing ink and a liquid retainer impregnated with liquid whose vap ...


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Shigeyasu Inoue, Tatsuya Ozu, Yasunori Nakatani: Writing inplement with magnetic closure. Kabushiki Kaisha Sakura Kurepasu, Jordan and Hamburg, June 11, 1991: US05022775 (6 worldwide citation)

A writing implement having a sleeve formed with a bore extending therethrough axially of the implement, a barrel inserted in the bore of the sleeve and retractably projectable forward from the forward end of the sleeve, and a closure so shaped as to close the forward end opening of the sleeve bore. ...


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Tatsuya Ozu, Masahiro Yasunaga, Shigeyasu Inoue: Writing implement and a fabricating method thereof. Kabushiki Kaisha Sakura Kurepasu, Fish & Richardson, September 20, 1994: US05348411 (5 worldwide citation)

A writing implement includes a valve device provided at a specified position along a liquid passage along which liquid to be applied flows. The valve device has a ball valve member, a chamber portion in which the ball valve member is placed, the chamber portion having a cross-section in the form of ...


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Shigeyasu Inoue, Tatsuya Ozu, Yasunori Nakatani: Ink applicator, ink backflow prevention mechanism of ink applicator, and a pen tip. Sakura Color Products Corporation, Wood Phillips VanSanten Clark & Mortimer, September 4, 2001: US06283662 (3 worldwide citation)

An applicator that makes it unlikely for an ink, particularly water-based or alcohol solvent ink, to become blurred and assures smooth writing, including an ink reservoir accommodating an ink, a penpoint tip for ink application, and a valve mechanism, wherein the valve mechanism has an axially movab ...


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Shigeyasu Inoue, Toshimitsu Kawasumi: Aqueous ball point ink composition. Sakura Color Products Corporation, Larson & Taylor, January 27, 1998: US05712328 (2 worldwide citation)

An aqueous ball point ink composition comprising a key aqueous ball point ink composition comprising coloring materials consisting of (pigment and pigment dispersant) and/or precolored emulsion resin, water-soluble organic solvent, pseudoplastic imparting agent and water and cross-linked polyacrylat ...