Patents by Inventor Mitsuru Yamamoto
Mitsuru Yamamoto 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: 5515512Abstract: A multi-media terminal apparatus controls switches to perform communications, so that processing units of its own terminal which controls various multi-media processing functions are connected to other multi-media terminal apparatuses via a transmission line having a plurality of channels in accordance with connection request instructions, or this connection state and connections among the processing units are simultaneously attained.Type: GrantFiled: June 7, 1995Date of Patent: May 7, 1996Assignee: Canon Kabushiki KaishaInventor: Mitsuru Yamamoto
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Patent number: 5478704Abstract: i) A method of forming color images improved in color reproducibility and sharpness, which comprises providing a silver halide color photographic material which has on a support at least one emulsion layer unit constituted of at least two silver halide emulsion layers having the same color sensitivity and different photographic speeds, and which contains at least one DIR compound represented by the following general formula (II) in at least one layer selected from said emulsion layer unit and other constituent layers; exposing said color photographic material, and processing said color photographic material with a color developer containing at least one compound represented by the following general formula (I): ##STR1## wherein R.sub.1 represents an alkyl group or a hydroxyalkyl group containing; R.sub.2 represents an alkylene group containing, or a straight-chain or branched hydroxyalkyiene group containing 3 to 6 carbon atoms; R.sub.Type: GrantFiled: August 17, 1994Date of Patent: December 26, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Masato Taniguchi, Nobutaka Ohki, Mitsuru Yamamoto, Akimitsu Haijima
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Patent number: 5460929Abstract: There is disclosed a silver halide color photographic material having a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a blue-sensitive silver halide emulsion layer, which comprises a cyan dye-forming coupler represented by formula (Ia) and (a) a sensitizing dye containing a sulfonamide group, (b) negative-type internal latent image-type silver halide grains chemically sensitized to a defined depth from the surface, (c) grains each having a defined spectral sensitivity distribution and a DIR-hydroquinone, (d) a monodisperse silver halide emulsion, (e) non-photosensitive silver halide emulsion wherein the inside or the surface of grains is fogged, (f) a colloidal silver, or (g) a DIR-hydroquinone: ##STR1## wherein Za represents --NH-- or --CH(R.sub.3)--, Zb and Zc each represent --C(R.sub.4).dbd. or --N.dbd., R.sub.1, R.sub.2, and R.sub.3 each represent an electron-attracting group wherein the Hammett substituent constant .sigma..sub.p value is 0.Type: GrantFiled: April 14, 1993Date of Patent: October 24, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoshi Nagaoka, Kazuyoshi Yamakawa, Mitsuru Yamamoto, Makoto Suzuki, Yasuhiro Shimada, Katsuro Nagaoka, Hideo Ikeda, Takefumi Hara, Sadanobu Shuto
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Patent number: 5336591Abstract: A silver halide color photographic material comprising a support having thereon at least one blue-sensitive silver halide emulsion layer, wherein said blue-sensitive silver halide emulsion layer contains at least one yellow dye forming coupler represented by the following general formula (1) or (2), and at least one yellow dye forming coupler represented by the following general formula (F): ##STR1## wherein X.sub.1 and X.sub.2 each represents an alkyl group, an aryl group or a heterocyclic group; X.sub.3 represents an organic residue which forms a nitrogen-containing heterocyclic group together with >N--; Y represents an aryl group or a heterocyclic group; and Z represents a group which is capable of being released when the coupler of general formula (1) or (2) reacts with an oxidation product of a developing agent; ##STR2## wherein R.sub.20 represents a tertiary alkyl group; R.sub.21 represents a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, an alkyl group or a dialkylamino group; R.Type: GrantFiled: March 4, 1992Date of Patent: August 9, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Mitsuru Yamamoto, Akira Ogawa
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Patent number: 5250406Abstract: There is disclosed a silver halide color photographic material comprising a photosensitive silver halide emulsion layer that contains an acylacetamide yellow dye-forming coupler whose acyl group is represented by formula (Y-I) and a compound represented formula (I). ##STR1## wherein R.sub.1 represents a monovalent group, O represents a group of nonmetallic atoms required to form together with C a 3- to 5-membered hydrocarbon ring or a 3- to 5-membered heterocyclic ring that contains a hetero atom selected from the group consisting of N, O, S, and P, provided that R.sub.1 is not a hydrogen atom and it does not bond to Q to form a ring. ##STR2## wherein A represents an oxidation-reduction (redox) residue or its precursor, which is an atomic group that allows --Time).sub.Type: GrantFiled: October 7, 1991Date of Patent: October 5, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Mitsuru Yamamoto, Hidetoshi Kobayashi
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Patent number: 5210012Abstract: A silver halide color photographic material is provided comprising on a support at least one silver halide emulsion layer containing at least one of the compounds represented by formulae (I) to (III): ##STR1## wherein R.sub.11 represents ##STR2## in which R.sub.13 represents an alkyl, aryl or heterocyclic group, and R.sub.14 and R.sub.15 each represents hydrogen, alkyl group or aryl group; R.sub.12 represents a substituent having a Hammett's substituent constant .sigma.p of 0.3 or less; n represents an integer 0 to 2, and when n is 2, the two R.sub.12 's may be the same or different; B represents a group which releases PUG after being separated from a hydroquinone nucleus; PUG represents a development inhibitor; l represents an integer; and A and A' each represents hydrogen or a group capable of being removed by an alkali; R.sub.11 and R.sub.12, R.sub.11 and A or A', R.sub.12 and A or A', and two R.sub.12 's may together form a ring; ##STR3## wherein Q.sup.Type: GrantFiled: January 31, 1991Date of Patent: May 11, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Michio Ono, Kouichi Hanaki, Kei Sakanoue, Shigeo Hirano, Mitsuru Yamamoto
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Patent number: 5025196Abstract: An image forming device having an electron beam generating device is provided which comprises a plural number of electron beam generating sections and a deflecting means capable of deflecting the group of electron beams emitted from this electron beam generating device in the two directions of X and Y.Type: GrantFiled: June 26, 1990Date of Patent: June 18, 1991Assignee: Canon Kabushiki KaishaInventors: Hidetoshi Suzuki, Ichiro Nomura, Toshiaki Majima, Mitsuru Yamamoto
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Patent number: 4982906Abstract: A multi-chamber inclined ball mill comprises a base, a frame-shaped support member rotatably supported on the base, and a grinding chamber rotatably supported on the frame-shaped support member. The grinding chamber is constituted of at least three cylindrical chambers each provided with outwardly tapered protrusions at its opposite ends and the cylindrical chambers integrally formed so that their longitudinal axes mutually intersect at the centers thereof and form a common grinding space at their region of intersection. The grinding chamber is supported on the frame-shaped support member such that the longitudinal axes of the cylindrical chambers intersect the axis of rotation of the frame-shaped support member at a single point and at one and the same angle.Type: GrantFiled: March 14, 1990Date of Patent: January 8, 1991Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & IndustryInventors: Hiroshi Sakamoto, Mitsuru Yamamoto, Hitoshi Ohya
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Patent number: 4966836Abstract: A direct positive photographic light-sensitive material comprising a support having thereon at least one internal latent image type silver halide emulsion layer not having been previously fogged, wherein the photographic light-sensitive material contains at least one nucleating agent represented by a specific formula and at least one nucleating accelerating agent selected from compounds represented by two specific formulae. The direct positive photographic light-sensitive material according to the present invention provides direct positive images having a high maximum image density and a low minimum image density, and is less susceptible to change in photographic properties such as reduction in the maximum image density and increase in the minimum image density when it is preserved under high temperature and/or high humidity conditions.Type: GrantFiled: December 2, 1988Date of Patent: October 30, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Shigeo Hirano, Tetsuo Kojima, Mitsuru Yamamoto
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Patent number: 4958104Abstract: A display device has an electron ray generating unit of matrix electrode structure in which a plurality of cold cathodes generating electron rays are arranged two-dimensionally, image storing apparatus for storing therein image information as an amount of charges by a variation in a surface potential produced by the application of the electron rays from the electron ray generating unit, and a display for receiving the application of the electron rays applied from the electron ray generating unit and modulated by the electric charge stored in the image storing apparatus and visualizing the image information.Type: GrantFiled: June 29, 1989Date of Patent: September 18, 1990Assignee: Canon Kabushiki KaishaInventors: Hidetoshi Suzuki, Mitsuru Yamamoto, Toshiaki Majima, Ichiro Nomura
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Patent number: 4859579Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide photographic emulsion layer, wherein at least one layer selected from the emulsion layer and other hydrophilic colloid layers contains at least one alkynyl substituted heterocyclic quaternary ammonium salt represented by the following general formula (I): ##STR1## wherein Z represents a non-metallic atomic group necessary to form a substituted or unsubstituted 5-membered or 6-membered heterocyclic ring to which a aromatic ring or a heterocyclic ring may further be condensed; R.sup.1 represents a substituted or unsubstituted aliphatic group; X represents ##STR2## Q represents a non-metallic atomic group necessary to form a substituted or unsubstituted 4-membered to 12-membered non-aromatic hydrocarbon ring or substituted or unsubstituted non-aromatic heterocyclic ring; at least one of R.sup.Type: GrantFiled: January 28, 1988Date of Patent: August 22, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Tetsuro Kojima, Mitsuru Yamamoto, Noriyuki Inoue, Tatsuo Heki
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Patent number: 4773738Abstract: An optical modulation device includes: a ferroelectric liquid crystal disposed between a pair of substrates; provision for applying an alternating voltage sufficient to render the ferroelectric liquid crystal turbid; and provision for superposing a DC voltage on the alternating voltage. A portion of the ferroelectric liquid crystal rendered turbid through the application of an alternating voltage is selectively caused to have an increased transmittance when superposed with a DC voltage.Type: GrantFiled: August 25, 1987Date of Patent: September 27, 1988Assignee: Canon Kabushiki KaishaInventors: Naoji Hayakawa, Fumitaka Kan, Toshiaki Majima, Masanori Takenouchi, Ichiro Nomura, Mitsuru Yamamoto, Hidetoshi Suzuki
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Patent number: 4714935Abstract: An ink-jet head driver comprises: a pressure chamber filled with a recording liquid; a piezo-electric element as electrical/mechanical transducing means for enlarging the capacity of the pressure chamber at a first stage and contracting it in a second stage into the state before enlargement, thereby emitting the recording liquid; and a device for adjusting the time interval between the first and second stages to adjust the emitting velocity. The capacity of the pressure chamber is changed due to charge and discharge by a charging/discharging circuit, and charge/discharge time constants of this circuit are selectively controlled by a control unit. According to this driver, mixture of air into recording liquid in the ink-jet head when the piezo-electric element is expanded is prevented, and a variable range of a dot diameter of the recording liquid droplet can be extended, thereby improving recording quality.Type: GrantFiled: September 23, 1986Date of Patent: December 22, 1987Assignee: Canon Kabushiki KaishaInventors: Mitsuru Yamamoto, Nobuaki Sakurada, Yoshitaka Watanabe
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Patent number: 4675699Abstract: An image-recording apparatus which comprises:(a) an image-recording medium comprising a pair of substrates and a thermo-optical liquid crystal provided between the pair of the substrates,(b) a heating means for uniformly heating the liquid crystal up to obtain an isotropic phase,(c) a means for applying an electrical field to the liquid crystal, and(d) a writing means for conducting writing by locally heating the image-recording medium.Type: GrantFiled: January 15, 1986Date of Patent: June 23, 1987Assignee: Canon Kabushiki KaishaInventors: Fumitaka Kan, Naoji Hayakawa, Toshiaki Majima, Masanori Takenouchi, Mitsuru Yamamoto, Hidetoshi Suzuki, Ichiro Nomura
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Patent number: D295153Type: GrantFiled: March 27, 1985Date of Patent: April 12, 1988Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kuniaki Ryuzoji, Mitsuru Yamamoto, Kazuhiko Saito, Yukinori Kawaguchi, Yoshiharu Hashimoto
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Patent number: D297132Type: GrantFiled: March 15, 1985Date of Patent: August 9, 1988Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kuniaki Ryuzoji, Mitsuru Yamamoto, Kazutaka Kimura, Yukinori Kawaguchi, Yoshiharu Hashimoto
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Patent number: D298744Type: GrantFiled: August 11, 1986Date of Patent: November 29, 1988Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kazuhiko Saito, Mitsuru Yamamoto, Tetsuya Nakazawa, Shigeru Kuroda, Yumio Shibata
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Patent number: D299324Type: GrantFiled: April 7, 1986Date of Patent: January 10, 1989Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Oba, Mitsuru Yamamoto, Akira Watanabe
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Patent number: D301849Type: GrantFiled: April 8, 1986Date of Patent: June 27, 1989Inventors: Yasuhiro Oba, Mitsuru Yamamoto, Akira Watanabe
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Patent number: D305999Type: GrantFiled: June 10, 1987Date of Patent: February 13, 1990Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kyohei Ueda, Mitsuru Yamamoto, Tetsuya Nakazawa, Kazuhiko Saito