Patents by Inventor Tadashi Shimizu
Tadashi Shimizu 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: 6948657Abstract: The present invention provides a document verification system capable of verifying whether a document is an original at low cost and with ease. A terminal device acquires, as a registered feature vector feature information indicating a feature of a nonreproducible disorder portion in a printing region on a document serving as the original, and stores the registered feature vector on a hard disk via the Internet. A server acquires, as a calculated feature vector the same information as the registered feature vector in a document to be verified as to whether the document is the original, reads out the registered feature vector from the hard disk, compares the acquired calculated feature vector with the read out registered feature vector, and verifies whether the document to be verified is the original on the basis of a result of the comparison.Type: GrantFiled: April 9, 2003Date of Patent: September 27, 2005Assignee: Fuji Xerox Co., Ltd.Inventors: Hajime Sugino, Kensuke Ito, Tadashi Shimizu
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Publication number: 20050126439Abstract: The invention provides: (1) mesoporous silica characterized by having an average pore diameter in the mesopore region of from 1.5 to 10 nm, a nitrogen adsorption specific surface area determined by the BET method of from 500 to 1400 m2/g and a monolayer adsorption of water at 25° C of 1.7/nm2 or more; (2) a process for synthesizing the mesoporous silica characterized by mixing and reacting active silica with a neutral template and removing the neutral template from the thus formed complex; (3) ink absorbents characterized by containing mesoporous silica; (4) ink absorbent slurries composed of the above-described ink absorbent and a solvent; and (5) recording sheets characterized by containing the above-described ink absorbent.Type: ApplicationFiled: November 15, 2004Publication date: June 16, 2005Inventors: Seiji Satou, Tadashi Shimizu
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Publication number: 20040245931Abstract: A lighting system includes a fluorescent lamp 4 and a main body 1 for attaching the fluorescent lamp 4 thereto. The main body 1 is provided with a socket assembly 6 for the attachment of the fluorescent lamp 4, and an electronic ballast 7 for operating the fluorescent lamp 4 at dimmed levels (as well as at the full light level). The fluorescent lamp 4 is composed of a discharge tube formed of four U-shaped glass tubes that are connected together to form a square in plan view. Each glass tube has an inner diameter of 13.5 mm, and the discharge tube is filled with a rare gas containing neon and argon (at 50:50 ratio by volume).Type: ApplicationFiled: April 26, 2004Publication date: December 9, 2004Inventors: Minoru Myojo, Akio Kitada, Tadashi Shimizu
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Publication number: 20040160188Abstract: An object of the present invention is to provide, without increasing the costs or decreasing the quantity of light, a fluorescent lamp that is less likely to have the bridge and the constituent tubes damaged while being handled and has improved handleability, as well as to provide a manufacturing method therefor. It is arranged so that the distance between the first and second constituent tubes gradually becomes smaller from the base side of the lamp toward the turning portion side of the lamp where the discharge paths turn. It is arranged so that the value of D2/D1 is within a range of 0.05 to 0.70 inclusive, where D1 is the distance between the first and second constituent tubes being measured at the bridge connecting points on the base side, and D2 is the shortest distance between the first and second constituent tubes on the turning portion side.Type: ApplicationFiled: December 9, 2003Publication date: August 19, 2004Inventors: Yusuke Okazaki, Nobutaka Ota, Toshiyuki Namura, Akio Kitada, Tadashi Shimizu
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Patent number: 6750613Abstract: A lighting system includes a fluorescent lamp 4 and a main body 1 for attaching the fluorescent lamp 4 thereto. The main body 1 is provided with a socket assembly 6 for the attachment of the fluorescent lamp 4, and an electronic ballast 7 for operating the fluorescent lamp 4 at dimmed levels (as well as at the full light level). The fluorescent lamp 4 is composed of a discharge tube formed of four U-shaped glass tubes that are connected together to form a square in plan view. Each glass tube has an inner diameter of 13.5 mm, and the discharge tube is filled with a rare gas containing neon and argon (at 50:50 ratio by volume). When operating the fluorescent lamp 4 at the full light level, the electronic ballast 7 applies the nominal lamp current of 0.43 A.Type: GrantFiled: March 25, 2003Date of Patent: June 15, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Minoru Myojo, Akio Kitada, Tadashi Shimizu
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Publication number: 20040107872Abstract: Disclosed is a cured form of calcium silicate, mainly comprising tobermorite and exhibiting a powder X-ray diffraction pattern in which the diffraction peak intensity Ib ascribed to the (220) plane of the tobermorite and the minimum diffraction intensity Ia observed in the diffraction angle range between the two diffraction peaks respectively ascribed to the (220) plane and (222) plane of the tobermorite satisfy the relationship Ib/Ia≧3.0; a differential pore distribution curve obtained by mercury porosimetry in which the logarithmic width of the pore diameter distribution as measured at a height of ¼ of the height of the maximum peak of the differential pore distribution curve is from 0.40 to 1.20, and also disclosed is a reinforced calcium silicate composite structure, and methods for producing same. The cured form of calcium silicate and the reinforced calcium silicate composite structure of the present invention which, while exhibiting an apparent specific gravity of from 0.14 to 1.Type: ApplicationFiled: August 19, 2003Publication date: June 10, 2004Inventors: Hiroyoshi Matsuyama, Kunio Matsui, Tadashi Shimizu
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Publication number: 20040079800Abstract: The present invention provides a document verification system capable of verifying whether a document is an original at low cost and with ease. A terminal device acquires, as a registered feature vector feature information indicating a feature of a nonreproducible disorder portion in a printing region on a document serving as the original, and stores the registered feature vector on a hard disk via the Internet. A server acquires, as a calculated feature vector the same information as the registered feature vector in a document to be verified as to whether the document is the original, reads out the registered feature vector from the hard disk, compares the acquired calculated feature vector with the read out registered feature vector, and verifies whether the document to be verified is the original on the basis of a result of the comparison.Type: ApplicationFiled: April 9, 2003Publication date: April 29, 2004Applicant: Fuji Xerox Co., Ltd.Inventors: Hajime Sugino, Kensuke Ito, Tadashi Shimizu
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Patent number: 6657614Abstract: The present invention provides a detection apparatus, an input apparatus, an individual identification apparatus, and a recording medium that utilize information about users' bodies which disables the fraud of impersonating authorized users and is extremely difficult to forge and is obtained without giving the users a sense of inhibitions, without restraining their bodies during use, and independent of their mental states and health. A FIFO memory outputs, as one set of features, a total of 60 voltage values, which are broken down as 20 voltage values sampled every 12.5 ms (80 Hz) before the instant when timing is inputted at the peak position of an amplitude waveform signal generated by one click operation, 39 voltage values sampled every 12.Type: GrantFiled: April 18, 2000Date of Patent: December 2, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Kensuke Ito, Kaoru Yasukawa, Hajime Sugino, Tadashi Shimizu, Katsura Sakai
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Publication number: 20030184239Abstract: A lighting system includes a fluorescent lamp 4 and a main body 1 for attaching the fluorescent lamp 4 thereto. The main body 1 is provided with a socket assembly 6 for the attachment of the fluorescent lamp 4, and an electronic ballast 7 for operating the fluorescent lamp 4 at dimmed levels (as well as at the full light level) . The fluorescent lamp 4 is composed of a discharge tube formed of four U-shaped glass tubes that are connected together to form a square in plan view. Each glass tube has an inner diameter of 13.5 mm, and the discharge tube is filled with a rare gas containing neon and argon (at 50:50 ratio by volume). When operating the fluorescent lamp 4 at the full light level, the electronic ballast 7 applies the nominal lamp current of 0.43 A.Type: ApplicationFiled: March 25, 2003Publication date: October 2, 2003Inventors: Minoru Myojo, Akio Kitada, Tadashi Shimizu
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Patent number: 6603867Abstract: A three-dimensional object identifying system is disclosed which identifies a three-dimensional shape object optically such as a part of a human body for preventing an information apparatus such as a personal computer from being used by any other illegitimate user than a legitimate user. The three-dimensional object identifying system has a function generating unit which generates modulation signals, light emitting elements which emit lights based on the modulation signals to a three-dimensional object, light receiving elements which receive reflected lights from the three-dimensional object and which produce detection signals, a correlation detecting unit which detects correlation information between each detection signal and modulation signal, and an identifying unit which performs identifying processing for the three-dimensional object on the basis of both pre-cataloged correlation information and the detected correlation information.Type: GrantFiled: August 30, 1999Date of Patent: August 5, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Hajime Sugino, Kensuke Ito, Tadashi Shimizu, Kaoru Yasukawa, Katsura Sakai
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Publication number: 20030126294Abstract: The device disclosed is capable of accepting and transmitting multiplexed compressed digital video, (Digital TV DTV/HDTV), in a MPEG2 Transport Stream (TS) form, from various devices and sources. It is intended to be used by broadcasting companies to leverage high-speed networks, for point to point and point to multipoint transmissions. The disclosure includes methods for Supporting DHCP and DNS. The processing of the received signals provides a Constant Delay for synchronization. This is obtained by providing at the receiving node provides buffering for accommodating network jitter and lost packages and for controlling the output bit rate. The buffering includes a buffer for retaining a predetermined quantity of data the effective size of which before the data is released is changed depending upon bit rate and the output bit rate is controlled by varying the amount of data retained.Type: ApplicationFiled: November 19, 2002Publication date: July 3, 2003Inventors: Thomas M. Thorsteinson, Steven A. Nikkel, David Tadashi Shimizu, Jose Alejandro Rueda, George F. Cosens
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Publication number: 20030031615Abstract: Mesoporous silica having highly hydrophobic properties, a process for producing the mesoporous silica whereby the mesoporous silica can be synthesized under mild conditions with the use of inexpensive materials, and ink absorbents and recording sheets having a high ink-absorptivity, and being excellent in water resistance and light resistance are provided.Type: ApplicationFiled: May 22, 2000Publication date: February 13, 2003Inventors: SEIJI SATOU, TADASHI SHIMIZU
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Publication number: 20020161472Abstract: A design apparatus for efficiently designing a mold that has improved quality. The mold is manufactured by removing cutting area from a mold material. The apparatus includes a database for storing geometry data, which represents a shape of the mold, and a further database for storing process data, which represents the shape of the cutting area, in association with the geometry data.Type: ApplicationFiled: April 19, 2002Publication date: October 31, 2002Applicant: Fujitsu LimitedInventors: Akira Oshitani, Hatsuko Kouroku, Takahisa Yamada, Tadashi Shimizu, Chiharu Kamiya, Yutaka Takamatsu
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Patent number: 6464771Abstract: The invention relates to a hardened calcium silicate material characterized by having Ib/Ia which is greater than 3 (wherein Ib represents the diffraction peak intensity of the tobermorite (220) plane in powdery X-ray diffractometry; and Ia represents the minimum diffraction intensity in the angle region located between two diffraction peaks in the tobermorite (220) and (222) planes;), having a specific gravity of 0.2 or more but less than 0.7, and being substantially free from bubbles having a maximum diameter exceeding 200 &mgr;m; and a process for producing the same.Type: GrantFiled: August 23, 2000Date of Patent: October 15, 2002Assignee: Asahi Kasei Kabushiki KaishaInventors: Kunio Matsui, Tadashi Shimizu
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Patent number: 6272466Abstract: As a speaker produces a sound, the positions and angles of specular reflection plates put on the skin of the vocal organs and periphery thereof change. Resultantly, a ray of light applied from a light source section is reflected by the specular reflection plates uniquely in accordance with a law of reflection and the direction of the ray of light changes. Specularly reflected light spots moving on the face of a position detection sensor are detected by the position detection sensor, thereby detecting the positions of the specularly reflected light spots corresponding to the shape of the vocal organs and periphery thereof produced as the speaker produces the sound. Time characteristic and position change features are extracted based on the specularly reflected light spot positions detected. The features are compared with standard features patterns, thereby classifying input voice.Type: GrantFiled: March 2, 1998Date of Patent: August 7, 2001Assignee: Fuji Xerox Co., LTDInventors: Masaaki Harada, Shin Takeuchi, Motofumi Fukui, Tadashi Shimizu
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Patent number: 6071454Abstract: A method for producing a composite molded article, includes providing a molded product of a thermoplastic elastomer; and then molding a thermoplastic rigid resin on the molded thermoplastic elastomer, to provide a composite molded article.Type: GrantFiled: January 21, 1998Date of Patent: June 6, 2000Assignees: Chisso Corporation, Shimizu Industry Co., Ltd., Denso CorporationInventors: Tadashi Shimizu, Takehiko Enomoto, Masahiro Ito, Kenji Ogura
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Patent number: 6045427Abstract: In an X-ray image intensifier, an incident window on which X-rays are incident is fixed to a support frame fixed to a glass vessel. The incident window has a dome portion and a flat portion around the dome portion, and is fixed to the support frame through an annular brazing sheet. The brazing sheet has brazing material layers. The brazing material layers are melted, thereby welding the brazing sheet, the incident window, and the support frame with each other. A groove is formed in the brazing sheet to form a brazing material puddle, so the brazing material will not reach the input screen of the incident window during melting.Type: GrantFiled: October 10, 1997Date of Patent: April 4, 2000Assignee: Kabushiki Kaisha ToshibaInventors: Hitoshi Yamada, Tadashi Shimizu
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Patent number: 6001457Abstract: According to the present invention, in a casing having a casing member made of resin and a porous elastic member affixed onto the casing member, there is formed a thick wall portion, which is thicker than the other portions, at a bending corner portion formed between wall surfaces of the casing member. In this way, when the resinous casing member is molded, the resin in a melted state flows along a surface at an opposite side of the elastic member (at a side of an affixing surface between the casing member and the insulator), in a space for forming the thick wall portion. Therefore, the resin in the melted state is prevented from flowing to press upward an end portion of the elastic member at the corner portion. Accordingly, the defective "reversing" is prevented so that the elastic member can be affixed on the wall surface of the casing member satisfactorily.Type: GrantFiled: November 3, 1997Date of Patent: December 14, 1999Assignees: Denso Corporation, Shimizu Industry Co., Ltd.Inventors: Masahiro Ito, Kenji Ogura, Tadashi Shimizu, Chiharu Kamiya, Yoshihide Kanai
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Patent number: 5990186Abstract: A polyurethane foam for a sealant is disclosed which is produced from a composition prepared by compounding reaction mixture comprising a polyisocyanate ingredient and a polyol ingredient with a given amount by weight of an ozone inhibitor ingredient. A sealant of a predetermined shape is obtained from the foam. The polyol ingredient may be one ordinarily used for producing soft polyurethane foams, but especially preferably comprises a polyester-polyether polyol having both an ester segment and an ether segment in the molecular chain. The foam has excellent resistance to ozone deterioration and hence retains a sufficient air permeability required of a sealant for practical use. Further, the foam suffers little decrease in tensile strength from the initial value because it also has excellent resistance to deterioration by moisture and heat, i.e., high hydrolytic stability.Type: GrantFiled: March 4, 1997Date of Patent: November 23, 1999Assignee: Inoac CorporationInventors: Kenichi Katoh, Tadashi Yano, Tadao Yasue, Masahiro Ito, Tadashi Shimizu
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Patent number: 5705885Abstract: In an X-ray image intensifier, an incident window on which X-rays are incident is fixed to a support frame fixed to a glass vessel. The incident window has a dome portion and a flat portion around the dome portion, and is fixed to the support frame through an annular brazing sheet. The brazing sheet has brazing material layers. The brazing material layers are melted, thereby welding the brazing sheet, the incident window, and the support frame with each other. A groove is formed in the brazing sheet to form a brazing material puddle, so the brazing material will not reach the input screen of the incident window during melting. In an alternate embodiment, an anti-wetting layer is disposed on the incident window to prevent brazing material from wetting the input screen. In a further embodiment, the thickness of the X-ray incident window has a thickness that increases gradually from the center toward a peripheral portion thereof.Type: GrantFiled: November 22, 1995Date of Patent: January 6, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Hitoshi Yamada, Tadashi Shimizu