Patents by Inventor Katsumi Tada

Katsumi Tada 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: 10301702
    Abstract: A can steel plate includes: equal or less than 0.0030% by mass of C; equal or less than 0.02% by mass of Si; 0.05-0.60% by mass of Mn; equal or less than 0.020% by mass of P; equal or less than 0.020% by mass of S; 0.010% to 0.100% by mass of Al; 0.0010-0.0050% by mass of N; 0.001-0.050% by mass of Nb; and balance Fe and impurities. Intensity of (111) [1-21] orientation (where ?2 represents 2 with bar in Miller indices) and intensity of (111)[1-10] orientation (where ?1 represents 1 with bar in Miller indices) satisfy the following equation (1), and in a rolling direction and 90° direction from the rolling direction in a horizontal plane, tensile strength TS (MPa) and fracture elongation El (%) satisfy relations of the following equations (2) and (3). (Intensity of (111) [1-21] orientation)/(Intensity of (111) [1-10] orientation)>0.9 . . . (1), TS>550 . . . (2), El>?0.02×TS+17.5 . . . (3).
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 28, 2019
    Assignees: JFE STEEL CORPORATION, THYSSENKRUPP RASSELSTEIN GMBH
    Inventors: Takumi Tanaka, Yusuke Nakagawa, Masaki Tada, Katsumi Kojima, Hiroki Nakamaru, Kathleen Stein-Fechner, Burkhard Kaup
  • Publication number: 20100043344
    Abstract: Provided is a building material with a higher specific gravity and/or radioactive-ray-shielding function while maintaining a workability equivalent to that of a conventional gypsum board. It relates to a gypsum-based building material manufactured by adding water to a composition in which a base material is a combination of a hydraulic gypsum and one kind or two or more kinds of dry-hardening calcium carbonate or calcium hydroxide or synthetic resin emulsions and an inorganic filler with a high specific gravity is compounded to it so that reaction and setting or drying and setting are conducted, wherein the composition is characterized by comprising 100 parts by weight of at least one kind or two or more kinds of base materials selected from the group consisting of calcium sulfate, calcium carbonate, calcium hydroxide and organic synthetic resin emulsions, and 50-3,000 parts by weight of at least one kind or two or more kinds of inorganic fillers whose true specific gravity is 3.5-6.
    Type: Application
    Filed: September 29, 2006
    Publication date: February 25, 2010
    Inventors: Katsumi Tada, Kouji Yamakata, Itaru Yokoyama, Koji Katsumoto
  • Patent number: 7333983
    Abstract: Retrieval conditions inputted from a plurality of users are registered. According to the retrieval conditions, a retrieval is conducted for a text inputted. As a result of the retrieval, similarity of the text is calculated for each retrieval condition. The text is delivered to users of which the retrieval condition satisfies the similarity.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: February 19, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiko Inaba, Tadataka Matsubayashi, Katsumi Tada, Takuya Okamoto, Natsuko Sugaya, Yousuke Ushiroji
  • Patent number: 7231388
    Abstract: Similar document retrieving method and system for retrieving similar documents from a document database storing plural documents written in different languages with high accuracy while suppressing retrieval noise even when difference is found in the number of registered documents in dependence on the species of description languages. Statistical information concerning the registration-subjected documents is collected on a language-by-language basis upon registration thereof. Upon retrieval of documents similar to a query document, weights of words extracted from the query document are taken into account and on a language-by-language basis by referencing the statistical information.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: June 12, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Tadataka Matsubayashi, Katsumi Tada, Yoshifumi Sato, Yasuhiko Inaba, Shin′ ya Yamamoto
  • Patent number: 7200587
    Abstract: A similar document search method includes a step of extracting a characteristic word candidate as a candidate for a characteristic word from a seeds document including desired retrieval contents, a step of extracting as characteristic words of the seeds document, when the characteristic word candidate extracted by the extracting step is a compound characteristic word including a plurality of characteristic words, the compound characteristic word and constituent characteristic words included in the compound characteristic word from the characteristic word candidate, a step of calculating, according to the characteristic words extracted by the extracting step, similarity between the seeds document and a registration document, and a step of outputting as a retrieval result a result of the similarity calculated by the similarity calculating step.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: April 3, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Tadataka Matsubayashi, Katsumi Tada, Yoshifumi Sato, Yasuhiko Inaba, Jugo Noda
  • Publication number: 20060218137
    Abstract: Retrieval conditions inputted from a plurality of users are registered. According to the retrieval conditions, a retrieval is conducted for a text inputted. As a result of the retrieval, similarity of the text is calculated for each retrieval condition. The text is delivered to users of which the retrieval condition satisfies the similarity.
    Type: Application
    Filed: November 24, 2003
    Publication date: September 28, 2006
    Inventors: Yasuhiko Inaba, Tadataka Matsubayashi, Katsumi Tada, Takuya Okamoto, Natsuko Sugaya, Yousuke Ushiroji
  • Patent number: 7080099
    Abstract: A computerized document management system manages and allows viewing of attachment documents in groups of electronic mail messages. A determination is first made as to whether an electronic mail message is a task message. If so, task history information, including the main text of the electronic mail message, attribute information, and information about relations with other messages, is stored. The attachment documents are then extracted and stored together with attachment document management information. Upon receipt of a search request, a list of attachment documents and task histories can then be displayed.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: July 18, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Tada, Toru Takahashi
  • Patent number: 7054860
    Abstract: In document retrieval having the relevance feedback function to modify a searching profile for retrieval on the basis of a user's evaluation to evaluate a search result as pertinent or impertinent, recommencement of the relevance feedback returned to a desired time is permitted. An evaluation inputted by a user, a searching profile modified by the evaluation and a search result based on the searching profile are all saved while making the correspondence between them. When a request for restoration of searching profile is made, a searching profile corresponding to an evaluation designated by the user is restored.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: May 30, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiko Inaba, Katsumi Tada, Natsuko Sugaya, Tadataka Matsubayashi, Akihiko Yamaguchi, Mikihiko Tokunaga
  • Patent number: 7047238
    Abstract: Disclosed are a document retrieval method and system for separately performing a process for correcting erroneously recognized characters existing in characteristic character strings within a seed document or the documents to be registered and a process for tolerating erroneously recognized characters existing in the documents targeted for retrieval. The process for correcting erroneously recognized characters existing in characteristic character strings extracts characteristic character strings from a read document, replaces the extracted characteristic character strings containing erroneously recognized characters with character strings appropriate for document retrieval, and selects characteristic character strings for use in actual document retrieval.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: May 16, 2006
    Assignees: Hitachi, Ltd., Hitachi Systems & Services, Ltd.
    Inventors: Katsumi Tada, Hisashi Takatori
  • Patent number: 7039636
    Abstract: Word boundary identification operations such as morpheme analysis is performed on documents to be registered, and the top positions and the end positions of words are identified. Word boundary information is obtained based on these identification results. Search indexes are created for sub-strings of a predetermined length (n-grams) extracted from the document being registered. The search index includes document identification information as well as occurrence position information which indicates that the string is located at the n-th position from the beginning of the text data, and word boundary information for an n-gram in a document.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: May 2, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Tada, Takuya Okamoto, Natsuko Sugaya, Tadataka Matsubayashi, Yasuhiko Inaba, Yasushi Kawashimo
  • Patent number: 7010519
    Abstract: An apparatus for expanding a character string. The character string that is entered to search includes a character string dividing device to divide the entered character string into partial character strings. A referencing device is provided to reference a similarity table. The similarity table stores in advance similar partial character strings, each of the similar partial character strings being derived from each of the partial character strings by changing at least one of the characters of each string to a different character which is similar in shape. An expansion device is provided to combine similar partial character strings into expanded words and store them in table.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: March 7, 2006
    Assignees: Hitachi, Ltd., Hitachi Systems & Services, Ltd.
    Inventors: Katsumi Tada, Naohiro Koizumi, Hisashi Takatori
  • Patent number: 6865571
    Abstract: A document retrieval method using a computer program includes retrieving a first set of documents using a first query expression generated by the computer program. The first set of documents is provided to a user. An evaluation of the first set of documents is received from the user. The first query expression is changed to a second query expression generated by the computer program based on the evaluation.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: March 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiko Inaba, Katsumi Tada, Natsuko Sugaya, Tadataka Matsubayashi, Akihiko Yamaguchi, Mikihiko Tokunaga
  • Publication number: 20040255218
    Abstract: Disclosed are a document retrieval method and system for separately performing a process for correcting erroneously recognized characters existing in characteristic character strings within a seed document or the documents to be registered and a process for tolerating erroneously recognized characters existing in the documents targeted for retrieval. The process for correcting erroneously recognized characters existing in characteristic character strings extracts characteristic character strings from a read document, replaces the extracted characteristic character strings containing erroneously recognized characters with character strings appropriate for document retrieval, and selects characteristic character strings for use in actual document retrieval.
    Type: Application
    Filed: February 21, 2003
    Publication date: December 16, 2004
    Applicants: Hitachi, Ltd., Hitachi Systems & Services, Ltd.
    Inventors: Katsumi Tada, Hisashi Takatori
  • Patent number: 6826567
    Abstract: A registration/search method for structured documents where correspondence data is prepared between a fixed-length-string and a string occurrence position within a structured document for all fixed-length-strings in the document and for each structured document. A list of a character and all hierarchical elements containing the character and element lengths is prepared. An occurrence frequency and an occurrence position of a search term is obtained using the plurality of fixed-length-substrings and the occurrence frequency extracting index. A search character is selected from the search term. A hierarchical element containing the search character is obtained using the character from the element length index. A length of the element corresponding to a search range is extracted using the obtained occurrence position. A matching degree for the search term is calculated from the obtained occurrence frequency of the search term and the extracted element length of the element corresponding to the search range.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: November 30, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Tada, Natsuko Sugaya, Tadataka Matsubayashi, Takuya Okamoto, Yasushi Kawashimo
  • Patent number: 6757676
    Abstract: A text mining method whereby documents (texts) can be analyzed from a wide variety of visual points.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: June 29, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Natsuko Sugaya, Katsumi Tada, Tadataka Matsubayashi, Akihiko Yamaguchi, Yasuhiko Inaba, Mikihiko Tokunaga
  • Patent number: 6738786
    Abstract: In a text mining technique, if the system only extracts characteristic words and phrases frequently cooccurring with the respective components of an analysis axis as an analysis condition, similar words and phrases are extracted for any component. To clearly indicate existence of characteristic words and phrases which do not appear as cooccurrence words and phrases for other components of the analysis axis, it is desired to appropriately present distinguishable features between the components to the user. For this purpose, the frequency of appearances of a plurality of characteristic words and phrases in a document satisfying each analysis condition is calculated. As a result, multiple cooccurrence words and phrases and component-cooccurrence words and phrases are discriminatively displayed. It is therefore possible for the user to appropriately analyze the contents of a plurality of documents.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: May 18, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Natsuko Sugaya, Katsumi Tada, Yoshifumi Sato, Tadataka Matsubayashi, Yasuhiko Inaba, Mikihiko Tokunaga
  • Publication number: 20040068495
    Abstract: In document retrieval having the relevance feedback function to modify a searching profile for retrieval on the basis of a user's evaluation to evaluate a search result as pertinent or impertinent, recommencement of the relevance feedback returned to a desired time is permitted. An evaluation inputted by a user, a searching profile modified by the evaluation and a search result based on the searching profile are all saved while making the correspondence between them. When a request for restoration of searching profile is made, a searching profile corresponding to an evaluation designated by the user is restored.
    Type: Application
    Filed: October 6, 2003
    Publication date: April 8, 2004
    Applicant: HITACHI, LTD.
    Inventors: Yasuhiko Inaba, Katsumi Tada, Natsuko Sugaya, Tadataka Matsubayashi, Akihiko Yamaguchi, Mikihiko Tokunaga
  • Patent number: 6713225
    Abstract: The invention provides a 1,2-naphthoquinone-2-diazidesulfonate ester photosensitive agent which is useful as a photosensitive agent employed in a photoresist for producing semiconductor integrated circuits, liquid crystal displays, EL displays, etc., a method for producing the photosensitive agent, and a photoresist composition containing the photosensitive agent.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: March 30, 2004
    Assignee: Toyo Gosei Kogyo Co., Ltd.
    Inventors: Hirotada Iida, Miharu Suwa, Yuichi Hagiwara, Katsumi Tada, Suehiro Katori, Tsuneaki Miyazaki
  • Patent number: 6665668
    Abstract: A document retrieval system is provided which has a document display interface which is easy to recognize the important portions even if a document retrieved by using a query expression designated by a document or a long sentence is displayed. When a text is registered, predetermined character strings and location information which are extracted from the text are stored in a location information file. A weight of each character string is calculated by a predetermined method and is stored in a weight file. In retrieving a document, predetermined character strings are extracted from a designated query expression. A similarity is calculated between the query expression and texts in the database by using the location information and the weights acquired from the location file and the weight file. In displaying the document, character strings having the high weights are extracted from the character strings used for the retrieval.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: December 16, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Natsuko Sugaya, Katsumi Tada, Tadataka Matsubayashi, Akihiko Yamaguchi, Yasuhiko Inaba, Yousuke Ushiroji
  • Patent number: 6665667
    Abstract: Retrieval conditions inputted from a plurality of users are registered. According to the retrieval conditions, a retrieval is conducted for a text inputted. As a result of the retrieval, similarity of the text is calculated for each retrieval condition. The text is delivered to users of which the retrieval condition satisfies the similarity.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: December 16, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiko Inaba, Tadataka Matsubayashi, Katsumi Tada, Takuya Okamoto, Natsuko Sugaya, Yousuke Ushiroji