Patents by Inventor Takashi Kawana

Takashi Kawana 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).

  • Patent number: 6967727
    Abstract: An image forming apparatus for forming an image of multilevel image data includes a driving unit for driving an image forming element for image formation, an additional data generating unit for generating a digital signal string based on predetermined additional data, and an input unit for superposing a digital signal string related to the multilevel image data and the digital signal string based on the additional data and inputting the superposed digital signal string to the driving unit.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: November 22, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Kawana
  • Publication number: 20050213161
    Abstract: An image forming apparatus for forming an image of multilevel image data includes a driving unit for driving an image forming element for image formation, an additional data generating unit for generating a digital signal string based on predetermined additional data, and an input unit for superposing a digital signal string related to the multilevel image data and the digital signal string based on the additional data and inputting the superposed digital signal string to the driving unit.
    Type: Application
    Filed: May 3, 2005
    Publication date: September 29, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventor: Takashi Kawana
  • Patent number: 6477319
    Abstract: An image recording apparatus for recording image data from an external apparatus is provided, which receives the image data as an image signal from the external apparatus, records the received image signal, and outputs a characteristic signal regarding a recording characteristic of the recording apparatus to the external apparatus.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: November 5, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Michio Ito, Masaharu Ohkubo, Hiroshi Sasame, Hiromichi Yamada, Masaki Ojima, Kaoru Seto, Hiroshi Mano, Atsushi Kashihara, Takashi Kawana
  • Patent number: 6268310
    Abstract: The present invention is directed to oxazole derivatives represented by the formula [I]; wherein A represents a nitrogen atom or a R3-substituted carbon atom; B represents a nitrogen atom, or an unsubstituted or X-substituted carbon atom; Z represents an oxygen atom, sulfinyl or sulfonyl; R1 and R2 represent each independently hydrogen, C1-C6 alkyl, C1-C6 alkoxy, C1-C6 haloalkoxy, C1-C6 haloalkyl or the like; R3 represents hydrogen, C1-C6 alkyl, halogen, nitro, formyl or acyl; X represents hydrogen, C1-C6 alkyl, C3-C7 cycloalkyl, C2-C6 alkenyl, C3-C6 alkynyl, C1-C6 haloalkyl or the like; Y represents hydrogen, C1-C6 alkyl, C3-C7 cycloalkyl, C2-C6 alkenyl, C3-C6 alkynyl, C1-C6 haloalkyl or the like; m represents an integar of 1 or 2, and n represents an integar of 1, 2, 3 or 4, and the salts thereof. The compounds specified in the present invention have an excellent herbicidal activity and are useful as an active ingredients for herbicides.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: July 31, 2001
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Akiyoshi Ueda, Yasuyuki Miyazawa, Yoshihiko Hara, Masami Koguchi, Akihiro Takahashi, Takashi Kawana
  • Patent number: 6253035
    Abstract: An image forming apparatus includes an image bearing member, a container for containing a developer removed from the image bearing member, a detector for detecting an amount of developer removed from the image bearing member and contained in the container, and a failure detector for detecting a failure of the developer amount detector on the basis of the degree of use of the image bearing member and a detection result of the developer amount detector.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: June 26, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Kawana, Hiroshi Sasame, Yoshimi Ogasawara, Fumihiro Ueno, Eiichiro Teshima, Tomoyuki Okada
  • Patent number: 6188852
    Abstract: A process cartridge removably mountable on a body of an image forming apparatus, includes an electrophotographic photosensitive member, a process device acting on the electrophotographic photosensitive member, and a memory storing therein information regarding the process cartridge. It is characterized in that the memory itself stores therein the frequency of writing of information into the memory.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: February 13, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Ojima, Takashi Kawana
  • Patent number: 6134025
    Abstract: An output apparatus capable of receiving multi-level dot information of a first recording dot density, generating multi-level dot information of a second recording dot density, and transmitting the thus-generated second dot information in a visible way. The output apparatus comprises: a receiving device capable of receiving multi-level dot information of a first recording dot density; a generating device capable of generating multi-level interpolation dot information by applying a predetermined calculation to the thus-received multi-level dot information; and a dot density conversion device capable of generating multi-level dot information of a second, higher recording dot density from said interpolation dot information and the received multi-level dot information, whereby high density image data can be generated from low density image data.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: October 17, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Takeuchi, Takashi Kawana, Kaoru Seto, Michio Itoh, Hiroshi Atobe, Daisuke Murata, Atsushi Kashihara, Hiroshi Mano, Hiroshi Sasame, Hiromichi Yamada, Masaharu Ohkubo, Masaki Ojima, Tetsuo Saito, Seiji Uchiyama
  • Patent number: 6108105
    Abstract: An output apparatus capable of receiving multi-level dot information of a first recording dot density, generating multi-level dot information of a second recording dot density, and transmitting the thus-generated second dot information in a visible way. The output apparatus comprises: a receiving device capable of receiving multi-level dot information of a first recording dot density; a generating device capable of generating multi-level interpolation dot information by applying a predetermined calculation to the thus-received multi-level dot information; and a dot density conversion device capable of generating multi-level dot information of second higher recording dot density from said interpolation dot information and the received multi-level dot information, whereby high density image data can be generated from low density image data.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: August 22, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Takeuchi, Takashi Kawana, Kaoru Seto, Michio Itoh, Hiroshi Atobe, Daisuke Murata, Atsushi Kashihara, Hiroshi Mano, Hiroshi Sasame, Hiromichi Yamada, Masaharu Ohkubo, Masaki Ojima, Tetsuo Saito, Seiji Uchiyama
  • Patent number: 6107251
    Abstract: The present invention is directed to oxazole derivatives represented by the formula [I]; ##STR1## wherein A represents a nitrogen atom or a R.sub.3 -substituted carbon atom;B represents a nitrogen atom, or an unsubstituted or X-substituted carbon atom;Z represents an oxygen atom, sulfinyl or sulfonyl;R.sub.1 and R.sub.2 represent each independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 haloalkoxy, C.sub.1 -C.sub.6 haloalkyl or the like;R.sub.3 represents hydrogen, C.sub.1 -C.sub.6 alkyl, halogen, nitro, formyl or acyl;X represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.6 haloalkyl or the like;Y represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.6 haloalkyl or the like;m represents an integer of 1 or 2, andn represents an integar of 1, 2, 3 or 4, and the salts thereof.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: August 22, 2000
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Akiyoshi Ueda, Yasuyuki Miyazawa, Yoshihiko Hara, Masami Koguchi, Akihiro Takahashi, Takashi Kawana
  • Patent number: 6100421
    Abstract: The present invention is directed to a benzoic acid derivative methyl 3-formyl-4-methanesulfonyl-2-methylbenzoate. The compound is useful as a starting material for herbicide manufacture.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: August 8, 2000
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Hiroyuki Adachi, Masao Yamaguchi, Takahiro Sagae, Masami Koguchi, Kazuyuki Tomita, Takashi Kawana, Akihiro Takahashi
  • Patent number: 6101286
    Abstract: It is an object of this invention to provide an image processing apparatus which, when nonmagnetic mono-component development is performed, prevents the formation of white gaps in pattern boundaries between different colors and thereby prevents degradation in the image quality of the formed image. To achieve this object, in one embodiment of the invention, the density value VD(n) of the nth pixel on a certain line is applied to the A input terminal of a selector 207, and the density value VD(n-1) of the (n-1)th pixel is applied to the B input terminal of the selector 207. A subtracter 203 calculates the increase of VD(n) from VD(n-1). If a comparator 204 determines that the increase is a predetermined value C1 or less, a selection signal in the selector 207 is so set that the terminal B (the value of the immediately preceding pixel) is selected.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: August 8, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Shimizu, Haruo Fujii, Hiroshi Sasame, Tatsuya Kobayashi, Takashi Kawana, Tetsuya Kobayashi, Naoki Enomoto, Akihiko Uchiyama, Yoshiro Saito, Yoichiro Maebashi, Takaaki Tsuruya
  • Patent number: 6075904
    Abstract: An image processing apparatus for color-correcting image data for outputting to image forming means includes an input unit for inputting image data, a discrimination unit for determining whether or not the image data is of a predetermined color, a color correction unit for color-correcting the image data even if the image data is lower than a predetermined level in such a manner that a light emitting device in the image forming unit emits light at a small light emission level, and an output unit for outputting the color-corrected image data or image data generally representing white to the image forming means based on the result of the determination.
    Type: Grant
    Filed: June 12, 1999
    Date of Patent: June 13, 2000
    Inventors: Takashi Kawana, Tetsuya Kobayashi
  • Patent number: 6014533
    Abstract: A couple of electrical connectors for electrical connection includes first and second connectors. The first connector has first electrical contacts and has a memory. The second connector has second electrical contacts adjacent one end for electrical connection with the first connector. The second connector also has third electrical contacts adjacent another end for connection with a cable connector, for transmission of a signal of the memory. The interval of the second electrical contacts are different from that of the third electrical contacts. The interval of the third electrical contacts is smaller than that of the first electrical contacts. This structure facilitates the downsizing of the cable connector.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: January 11, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Kawana
  • Patent number: 5982983
    Abstract: An image recording apparatus for recording image data from an external apparatus is provided, which receives the image data as an image signal from the external apparatus, records the received image signal, and outputs a characteristic signal regarding a recording characteristic of the recording apparatus to the external apparatus.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: November 9, 1999
    Inventors: Michio Ito, Masaharu Ohkubo, Hiroshi Sasame, Hiromichi Yamada, Masaki Ojima, Kaoru Seto, Hiroshi Mano, Atsushi Kashihara, Takashi Kawana
  • Patent number: 5962685
    Abstract: The present invention is directed to oxazole derivatives represented by the formula ?I!; ##STR1## wherein A represents a nitrogen atom or a R.sub.3 -substituted carbon atom; B represents a nitrogen atom, or an unsubstituted or X-substituted carbon atom; Z represents an oxygen atom, sulfinyl or sulfonyl; R.sub.1 and R.sub.2 represent each independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 haloalkoxy, C.sub.1 -C.sub.6 haloalkyl or the like; R.sub.3 represents hydrogen, C.sub.1 -C.sub.6 alkyl, halogen, nitro, formyl or acyl; X represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.6 haloalkyl or the like; Y represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.6 haloalkyl or the like; m represents an integar of 1 or 2, and n represents an integar of 1, 2, 3 or 4, and the salts thereof.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: October 5, 1999
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Akiyoshi Ueda, Yasuyuki Miyazawa, Yoshihiko Hara, Masami Koguchi, Akihiro Takahashi, Takashi Kawana
  • Patent number: 5939360
    Abstract: The present invention is directed to a compound of formula ?I!: ##STR1## or a salt thereof in which R.sub.1 is a a C.sub.1-6 alkyl group, R.sup.2 is a halogen atom, a C.sub.1-6 alkylthio group, a C.sub.1-6 alkylsulfinyl group or a C.sub.1-6 alkylsulfonyl group, R.sup.3 and R.sup.4 are each independently hydrogen, a C.sub.1-6 alkyl group or a C.sub.1-6 haloalkyl group, and R is hydrogen or a C.sub.1-6 alkyl group. The present invention is further directed to a compound of formula ?1! or a salt thereof, as described above and in which R.sup.1 and R.sup.3 are methyl, R.sup.2 is chlorine or methylsulfonyl, R.sup.4 is hydrogen, and R is methyl or ethyl. In addition, the present invention is directed to a herbicidal composition, characterized in that it contains as active agent one or more compounds of formula ?I! or salt thereof in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 are as described above.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: August 17, 1999
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Hiroyuki Adachi, Masao Yamaguchi, Masami Koguchi, Akihiro Takahashi, Takashi Kawana, Katsunori Tanaka, Osamu Miyahara
  • Patent number: 5907748
    Abstract: An electrical connector for an electrophotographic image forming apparatus includes memory; a socket having the memory; plural electric contacts electrically connected with a contact of the memory; a short-circuit contact short-circuited with at least one of the electric contacts.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: May 25, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Kawana
  • Patent number: 5875044
    Abstract: An image forming apparatus and method produce, when 600 dpi image data is generated from 300 dpi image data, interpolated data of a pixel of interest by a two-value logical operation in a case where the image data about the periphery of the pixel of interest appertains to binary representation. When the image data is judged to appertain to an image of multivalued representation, the interpolated data of the pixel of interest is produced by a numerical operation. As a result, a 600 dpi picture of the same size can be printed and recorded in such a manner that outline sharpness and smoothness, which are characteristics possessed by a two-value image, are maintained at portions of the input 300 dpi image data that are two-value images while smoothness of the grayscale is maintained at portions of the input 300 dpi image data that are halftone images.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: February 23, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kaoru Seto, Atsushi Kashihara, Takashi Kawana, Manabu Takebayashi
  • Patent number: 5859948
    Abstract: An image recording apparatus for recording image data from an external apparatus receives the image data as an image signal from the external apparatus, records the received image signal, and outputs a characteristic signal regarding a recording characteristic of the recording apparatus to the external apparatus.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: January 12, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Michio Ito, Masaharu Ohkubo, Hiroshi Sasame, Hiromichi Yamada, Masaki Ojima, Kaoru Seto, Hiroshi Mano, Atsushi Kashihara, Takashi Kawana
  • Patent number: 5850295
    Abstract: The present invention is structured in such a manner that, when multivalued pixel data which constitutes a multivalued image are supplied, a predetermined number of interpolated pixel data are generated and inserted between the supplied and successive pixels. At this time, the gradient of each of the interpolated pixels is calculated and determined in accordance with the gradient of the supplied neighboring multivalued pixels. Thus, the image is recorded on a recording medium in accordance with image data including the interpolated pixel. As a result, print information processed so as to be printed by a low resolution printer can be printed with the same size and high quality as when printed by a high resolution printer according to the present invention.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: December 15, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiji Uchiyama, Atsushi Kashihara, Kaoru Seto, Hiroshi Mano, Tetsuo Saito, Takashi Kawana