Patents by Inventor Akira Tsuzuki

Akira Tsuzuki 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).

  • Publication number: 20060052340
    Abstract: It is an object of the present invention to provide an ophthalmic solution, which provides an enhanced comfort by suitably exhibiting an moisturizing effect to an eye and advantageously preventing an occurrence of unpleasant feelings caused by fluctuation of visual acuity. The ophthalmic solution of the present invention is provided by dissolving, in an aqueous medium, a hydroxypropylmethylcellulose, which has a molecular weight below a critical molecular weight for entanglements of an aqueous solution, which contains 3 w/w % of the hydroxypropylmethylcellulose, wherein kinematic viscosity of the ophthalmic solution at 20° C. is not higher than 2 mm2/s.
    Type: Application
    Filed: November 2, 2005
    Publication date: March 9, 2006
    Applicant: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Sayuri Iwamuro, Sadayasu Tanikawa
  • Publication number: 20060035842
    Abstract: It is an object of the present invention to provide an ophthalmic composition, wherein: the ophthalmic composition assures a sufficiently high degree of safety to eyes of the lens wearer; the ophthalmic composition reduces symptoms such as an unpleasant feeling or dryness of the eyes; the ophthalmic composition does not adversely affect a contact lens, such as a change of the size of the contact lens; and the ophthalmic composition advantageously improves a water wettability of surfaces of the contact lens, and the ophthalmic composition for the contact lens is prepared by adding at least one specific amino-sugar derivative to an aqueous medium.
    Type: Application
    Filed: September 16, 2005
    Publication date: February 16, 2006
    Applicant: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Sadayasu Tanikawa
  • Patent number: 6806243
    Abstract: An ophthalmic solution or contact lens solution comprising at least one germicidal/preservative component. The ophthalmic solution further comprises at least one selected amino-acid-based component, 0-0.2 wt. % of sodium chloride, and 0-0.5 wt. % of phosphate. The contact lens solution further comprises at least one selected acidic component and 0-0.2 wt. % of sodium chloride. Alternatively, the contact lens solution further comprises at least one selected amino-acid-based component, at least one selected acidic compound, and 0-0.2 wt. % of sodium chloride.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: October 19, 2004
    Assignee: Menicon Co., Ltd.
    Inventors: Kentaro Hozumi, Osamu Mori, Akira Tsuzuki
  • Publication number: 20030153622
    Abstract: An ophthalmic solution or contact lens solution comprising at least one germicidal/preservative component. The ophthalmic solution further comprises at least one selected amino-acid-based component, 0-0.2 wt. % of sodium chloride, and 0-0.5 wt. % of phosphate. The contact lens solution further comprises at least one selected acidic component and 0-0.2 wt. % of sodium chloride. Alternatively, the contact lens solution further comprises at least one selected amino-acid-based component, at least one selected acidic compound, and 0-0.2 wt. % of sodium chloride.
    Type: Application
    Filed: September 16, 2002
    Publication date: August 14, 2003
    Applicant: MENICON CO., LTD.
    Inventors: Kentaro Hozumi, Osamu Mori, Akira Tsuzuki
  • Patent number: 6544953
    Abstract: An ophthalmic composition which contains a component A consisting of at least one member selected from the group consisting of polyoxyalkylene block copolymers and their derivatives, and a component B consisting of at least one member selected from the group consisting of glycyrrhizic acid and its salts.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: April 8, 2003
    Assignee: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Sadayasu Tanikawa
  • Publication number: 20030022943
    Abstract: An ophthalmic composition which contains a component A consisting of at least one member selected from the group consisting of polyoxyalkylene block copolymers and their derivatives, and a component B consisting of at least one member selected from the group consisting of glycyrrhizic acid and its salts.
    Type: Application
    Filed: April 13, 2001
    Publication date: January 30, 2003
    Applicant: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Sadayasu Tanikawa
  • Patent number: 6417144
    Abstract: A solution for contact lenses which comprises an amino acid type cationic surfactant and at least one nonionic surfactant.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: July 9, 2002
    Assignee: Menicon., Ltd.
    Inventors: Akira Tsuzuki, Sadayasu Tanikawa
  • Publication number: 20020016270
    Abstract: A solution for contact lenses which comprises an amino acid type cationic surfactant and at least one nonionic surfactant.
    Type: Application
    Filed: June 13, 2001
    Publication date: February 7, 2002
    Applicant: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Sadayasu Tanikawa
  • Patent number: 6320008
    Abstract: A polymeric colorant represented by the following formula: A1—N═N—A2—O—(CH2)n-X wherein, A1 represents an aryl group which may have a substituent group, A2 represents an arylene group which may have a substituent group, X represents one of an acryloyloxy group, a methacryloyloxy group, a vinylphenyl group, a vinylphenyloxy group, and a vinylphenylalkyloxy group whose alkyl portion has 1-5 carbon atoms, and n is an integer of 1-5, and a colored material for an ocular lens which uses to the polymeric colorant is also disclosed.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: November 20, 2001
    Assignee: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Kazuharu Niwa, Tatsuya Ojio
  • Publication number: 20010021759
    Abstract: A polymeric colorant represented by the following formula:
    Type: Application
    Filed: April 17, 2001
    Publication date: September 13, 2001
    Applicant: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Kazuharu Niwa, Tatsuya Ojio
  • Patent number: 6242551
    Abstract: A polymeric colorant represented by the following formula: A1—N═N—A2—O—(CH2)n—X wherein, A1 represents an aryl group which may have a substituent group, A2 represents an arylene group which may have a substituent group, X represents one of an acryloyloxy group, a methacryloyloxy group, a vinylphenyl group, a vinylphenyloxy group, and a vinylphenylalkyloxy group whose alkyl portion has 1-5 carbon atoms, and n is an integer of 1-5, and a colored material for an ocular lens which uses the polymeric colorant is also disclosed.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: June 5, 2001
    Assignee: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Kazuharu Niwa, Tatsuya Ojio
  • Patent number: 6177480
    Abstract: An agent for contact lenses, which comprises an aqueous medium and synthetic smectites particulates consisting essentially of primary particles having a particle size of at most 200 nm, dispersed in the aqueous medium.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: January 23, 2001
    Assignee: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Osamu Mori
  • Patent number: 6121327
    Abstract: A contact lens disinfecting solution which does not include protease, wherein an organic nitrogen disinfectant and 0.01-5 w/v % of at least one polyol are contained in an aqueous medium.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: September 19, 2000
    Assignee: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Osamu Mori, Hideshi Nomura
  • Patent number: 5919742
    Abstract: A cleaning material for a contact lens formed of a polymer which is obtained by polymerizing a polymeric composition including at least a nonionic surface active agent having a polymerizable unsaturated double bond, and a cross-linking agent having a plurality of polymerizable unsaturated double bonds.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: July 6, 1999
    Assignee: Menicon Co., Ltd.
    Inventors: Akira Tsuzuki, Sadayasu Tanikawa
  • Patent number: 4663670
    Abstract: A television receiver having a liquid crystal display device includes a receiver having a electromagnetically shielded case and a receiving circuit provided in the shielded case and electrically connected to an antenna for producing audio signals and video signals. A liquid crystal display panel of the liquid crystal display device is electromagnetically shielded by a transparent and conductive shielding film for shielding the liquid crystal display panel.
    Type: Grant
    Filed: December 11, 1984
    Date of Patent: May 5, 1987
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Katsu Ito, Munehiro Shinabe, Akira Miyajima, Nobuyuki Hashimoto, Hideshi Ohno, Akira Tsuzuki, Shigeru Morokawa, Minoru Natori
  • Patent number: 4652932
    Abstract: A television receiver employs a liquid crystal display panel mounted in a unit which can be set into either a closed position in which the display panel is disposed within a recessed portion of the case of the television set, and an opened position in which ambient light passes through the display panel to be reflected from a mirror towards the viewer. In conjunction with this arrangement, operating control members are positioned to facilitate one-hand operation of the receiver, and the largest circuit components and batteries are positioned with respect to the display panel and control members such as to minimize the overall size of the receiver.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: March 24, 1987
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Akira Miyajima, Akira Tsuzuki, Hideshi Ohno, Shigeru Futakami, Takashi Ogura, Toshiaki Oguchi, Masaru Yoshida, Satoshi Kimura, Kotaro Takahashi, Hiroya Sakamoto, Koichi Nakajima
  • Patent number: 4646158
    Abstract: A liquid crystal television receiver has a first housing containing a television receiving circuit, a mirror mounted on an upper portion thereof, and a battery for driving the television receiving circuit, a second housing containing a liquid crystal display panel, and a third housing containing a light emitting element. The first, second and third housings are pivotally connected with each other at rear portions thereof, respectively.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: February 24, 1987
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Hideshi Ohno, Akira Tsuzuki, Toshiaki Oguchi, Shigeru Futami, Masaru Yoshida, Satoshi Kimura, Hiroyuki Uematsu, Kouichi Nakajima, Katuo Matsuyama, Hiroya Sakamoto, Yasuhiko Takayama, Osamu Matsumura, Toshio Sakaguchi
  • Patent number: 4500441
    Abstract: A cleaning and storage composition for contact lens comprising an anionic surface active agent and a non-ionic surface active agent. The composition has synergistically increased cleaning effect and safety to eye tissue by the combination use of anionic and non-ionic surface active agents, and it is suitable for use in storing contact lenses as well as cleaning the lenses.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: February 19, 1985
    Assignee: Toyo Contact Lens Co., Ltd.
    Inventors: Kyoichi Tanaka, Akira Tsuzuki, Shunichi Hioki
  • Patent number: 4465999
    Abstract: A method of cyclically driving an electro-optical display device having a matrix array of a plurality of row electrodes and a plurality of column electrodes, wherein said column electrodes intersect with said row electrodes to provide a plurality of display elements at intersections between said row and column electrodes, comprising the steps of: applying row drive signals to said row electrodes, respectively; and applying one of first, second and third column drive signals to each of said column electrodes, with said first column drive signal inducing a non-display state at all of the display elements along each column electrode, said second column drive signal inducing a non-display state at a single display element along said each column electrode and inducing a display state at the other two display elements along said each column electrode, and said third column drive signal inducing a display state at all of the display elements along said each column electrode; wherein each of said row drive signals ta
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: August 14, 1984
    Assignee: Citizen Watch Company Limited
    Inventors: Akira Tsuzuki, Hiro Fujita, Shigeru Morokawa
  • Patent number: 4443062
    Abstract: In a multi-layer display device such as a liquid crystal display, each of a plurality of sets of display elements is defined by a corresponding common electrode and a plurality of segment electrodes. Segment electrodes of sets of display elements which will not be activated simultaneously are connected together, with at least one of these sets being maintained in a deactivated state by means of a special drive signal applied to the corresponding common electrode. The level of time-sharing which must be utilized for driving the various common electrodes, for a given number of external connections to the segment electrodes, can thereby be reduced, or the overall number of connections made to the display device can be substantially reduced.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: April 17, 1984
    Assignee: Citizen Watch Company Limited
    Inventors: Seigo Togashi, Akira Tsuzuki, Hiro Fujita