Patents by Inventor Yuji Kubo
Yuji Kubo 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: 6771864Abstract: The present invention relates to an optical fiber transmission line and the like comprising a structure for enabling repeating sections to become further longer. The optical fiber transmission line comprises first and second optical fibers successively disposed along the traveling direction of signal light, and an optical multiplexer for supplying Raman amplification pumping light to one of the first and second optical fibers. The first and second optical fibers are optically connected to each other. The second optical fiber has an effective area smaller than that of the first optical fiber, and a chromatic dispersion and a length which are different from those of the first optical fiber. In particular, the respective lengths of the first and second optical fibers are appropriately regulated so as to effectively suppress nonlinear phenomena other than Raman amplification.Type: GrantFiled: August 15, 2002Date of Patent: August 3, 2004Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yuji Kubo, Makoto Shimizu, Toshiyuki Miyamoto
-
Patent number: 6748152Abstract: The optical transmission system in accordance with the present invention is an optical transmission system in which an optical fiber transmission line is laid between a transmitting station and a receiving station, first and second optical couplers are provided on the optical fiber transmission line, a first Raman amplification pumping light source is connected to the first optical coupler, a second Raman amplification pumping light source is connected to the second optical coupler, the optical fiber transmission line Raman-amplifies signal light in S band when Raman amplification pumping light is supplied thereto while transmitting the signal light, and the optical fiber transmission line has a zero-dispersion wavelength of 1350 nm to 1440 nm and a cable cutoff wavelength of less than 1368 nm.Type: GrantFiled: March 15, 2002Date of Patent: June 8, 2004Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yuji Kubo, Masashi Onishi, Takatoshi Kato
-
Patent number: 6743099Abstract: A plurality of player characters are displayed simultaneously. Switches including at least one of a plurality of orientation input means are assigned to the respective player characters. At least one of the plurality of player characters has a first mode in which the player character operates in accordance with inputs made by the switches assigned to the player character, and a second mode in which the player character operates in accordance with a predetermined sub-program. Switching between the first and second modes is effected when there is performed input operation by any one of switches assigned to the player characters.Type: GrantFiled: January 29, 2002Date of Patent: June 1, 2004Assignee: Konami CorporationInventors: Makoto Yabe, Hiroki Satoyoshi, Yuji Kubo
-
Patent number: 6711335Abstract: The heat-resistant coated optical fiber in accordance with the present invention comprises a coating portion 20, coated on the outer periphery of an optical fiber 10, comprising a first coating layer 21 consisting of aromatic polyimide resin, a second coating layer 22 consisting of silicone resin, and a third coating layer 23 consisting of moisture-resistant resin with a heat resistance equivalent to that of the first coating layer 21, e.g., PFA.Type: GrantFiled: November 19, 2001Date of Patent: March 23, 2004Assignee: Sumitomo Electric Industries, Ltd.Inventors: Makoto Shimizu, Yuji Kubo, Tomoyuki Hattori, Katsuyuki Tsuneishi
-
Publication number: 20040046632Abstract: A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 &mgr;m, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.Type: ApplicationFiled: June 4, 2003Publication date: March 11, 2004Inventors: Tomoji Kumano, Chikara Kaido, Hiroyasu Fujii, Kazutaka Higashine, Osamu Tanaka, Norikazu Fujii, Kazufumi Hanzawa, Masayoshi Tanaka, Yuji Kubo, Noriko Yamada
-
Publication number: 20040031439Abstract: Transferring and/or fusing part(s) for electrophotographic use consisting of a base and a releasing layer which is made of an organic-inorganic hybrid material containing fluoroalkyl group and formed on said base, is provided in the present invention. Said transferring and/or fusing part(s) have an excellent heat resistance, durability and toner releasing property.Type: ApplicationFiled: March 18, 2003Publication date: February 19, 2004Inventors: Yuko Shimizu, Takuya Shindo, Shingo Katayama, Yuji Kubo, Noriko Yamada
-
Patent number: 6687443Abstract: The present invention relates to an optical fiber transmission line and the like comprising a structure for enabling repeating sections to become further longer. The optical fiber transmission line comprises first and second optical fibers successively disposed along the advancing direction of signal light, and an optical multiplexer for supplying Raman amplification pumping light to one of the first and second optical fibers. The first and second optical fibers are fusion-spliced to each other, whereas at least one of them has a core region substantially made of pure silica glass. The second optical fiber has an effective area smaller than that of the first optical fiber, and a chromatic dispersion and a length which are different from those of the first optical fiber. In particular, the respective lengths of the first and second optical fibers are appropriately regulated so as to effectively suppress nonlinear phenomena other than Raman amplification.Type: GrantFiled: February 20, 2002Date of Patent: February 3, 2004Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yuji Kubo, Makoto Shimizu, Toshiyuki Miyamoto
-
Patent number: 6669532Abstract: A cold-gas-blow-cooling type machining apparatus including a relative movement device which moves a workpiece and a machining tool relative to each other, and a cold-gas-blow supply device which supplies a cold gas blow to a machining point at which the workpiece is machined by the machining tool. The machining apparatus includes: a workpiece-temperature detecting device which detects a temperature of the workpiece; and a machining-condition control device which controls at least one of the relative movement device and the cold-gas-blow supply device, on the basis of the detected temperature of the workpiece. The machining-condition control device includes a cooling-condition control device which controls the cold-gas-blow supply device so as to control at least one of a temperature and a flow rate of the cold gas blow.Type: GrantFiled: August 10, 2000Date of Patent: December 30, 2003Assignee: Toyota Jidosha Kabushiki KaishaInventors: Ryohei Mukai, Mamoru Katsuta, Takayuki Yoshimi, Koji Nishi, Naoto Ono, Yoshihiro Mizutani, Yasunori Kobayashi, Tadashi Kumazawa, Masaaki Sato, Yuji Kubo
-
Publication number: 20030174980Abstract: The optical transmission system in accordance with the present invention is an optical transmission system in which an optical fiber transmission line is laid between a transmitting station and a receiving station, first and second optical couplers are provided on the optical fiber transmission line, a first Raman amplification pumping light source is connected to the first optical coupler, a second Raman amplification pumping light source is connected to the second optical coupler, the optical fiber transmission line Raman-amplifies signal light in S band when Raman amplification pumping light is supplied thereto while transmitting the signal light, and the optical fiber transmission line has a zero-dispersion wavelength of 1350 nm to 1440 nm and a cable cutoff wavelength of less than 1368 nm.Type: ApplicationFiled: March 15, 2002Publication date: September 18, 2003Inventors: Yuji Kubo, Masashi Onishi, Takatoshi Kato
-
Publication number: 20030108313Abstract: The present invention relates to an optical fiber transmission line and the like comprising a structure for enabling repeating sections to become further longer. The optical fiber transmission line comprises first and second optical fibers successively disposed along the advancing direction of signal light, and an optical multiplexer for supplying Raman amplification pumping light to one of the first and second optical fibers. The first and second optical fibers are fusion-spliced to each other, whereas at least one of them has a core region substantially made of pure silica glass. The second optical fiber has an effective area smaller than that of the first optical fiber, and a chromatic dispersion and a length which are different from those of the first optical fiber. In particular, the respective lengths of the first and second optical fibers are appropriately regulated so as to effectively suppress nonlinear phenomena other than Raman amplification.Type: ApplicationFiled: February 20, 2002Publication date: June 12, 2003Inventors: Yuji Kubo, Makoto Shimizu, Toshiyuki Miyamoto
-
Publication number: 20030108315Abstract: The present invention relates to an optical fiber transmission line and the like comprising a structure for enabling repeating sections to become further longer. The optical fiber transmission line comprises first and second optical fibers successively disposed along the traveling direction of signal light, and an optical multiplexer for supplying Raman amplification pumping light to one of the first and second optical fibers. The first and second optical fibers are optically connected to each other. The second optical fiber has an effective area smaller than that of the first optical fiber, and a chromatic dispersion and a length which are different from those of the first optical fiber. In particular, the respective lengths of the first and second optical fibers are appropriately regulated so as to effectively suppress nonlinear phenomena other than Raman amplification.Type: ApplicationFiled: August 15, 2002Publication date: June 12, 2003Applicant: Sumitomo Electric Industries, Ltd.Inventors: Yuji Kubo, Makoto Shimizu, Toshiyuki Miyamoto
-
Patent number: 6567596Abstract: An optical fiber that can sufficiently suppress the generation of four-wave mixing and that can widen the bandwidth of wavelength of signal light. The optical fiber of the present invention has (a) a chromatic dispersion whose absolute value is not less than 8 ps·nm−1·km−1 and not more than 15 ps·nm−1·km−1 at a wavelength of 1.55 &mgr;m and (b) a dispersion slope whose absolute value is not more than 0.05 ps·nm−2·km−1 at a wavelength of 1.55 &mgr;m. It is more desirable that the optical fiber have (a) a chromatic dispersion whose absolute value is not less than 8 ps·nm−1·km−1 and not more than 12 ps·nm−1·km−1 at a wavelength of 1.55 &mgr;m, (b) a dispersion slope whose absolute value is not more than 0.03 ps·nm−2·km−1 at a wavelength of 1.Type: GrantFiled: December 11, 2000Date of Patent: May 20, 2003Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takatoshi Kato, Masashi Onishi, Yuji Kubo
-
Publication number: 20030044147Abstract: An optical fiber 1 comprising a glass portion 2 having a core 2a and a cladding 2b, and one or more covering layers 3 formed around the glass portion 2, in which an arrangement form of the covering layer 3 with respect to the glass portion 2 in cross section perpendicular to a longitudinal direction thereof is changed continuously in the longitudinal direction thereof.Type: ApplicationFiled: September 30, 2002Publication date: March 6, 2003Inventors: Koji Shimoda, Yuji Kubo, Makoto Shimizu
-
Publication number: 20030040364Abstract: In a fighting game in which a plurality of characters controlled by players are displayed on a display to fight with each other, a computer program provides a first mode in which at least three characters are displayed on a first screen to fight with each other, and a second mode in which two characters are displayed on a second screen to perform a man-to-man battle. A current mode of the fighting game is switched between the first mode and the second mode.Type: ApplicationFiled: August 8, 2002Publication date: February 27, 2003Applicant: KONAMI CORPORATIONInventors: Makoto Yabe, Hidehiro Hirata, Yuji Kubo, Kazuki Yamamura, Noriaki Okamura
-
Patent number: 6490397Abstract: An optical fiber whose chromatic dispersions have an opposite sign relative to those of the 1380 nm zero-dispersion fiber at all of the wavelengths in the range of 1450 nm to 1620 nm is provided. This optical fiber has negative chromatic dispersions at all of the wavelengths in this range and the values of which are −7 ps·nm−1·km−1 or more but −1 ps·nm−1·km−1 or less at a wavelength of 1450 nm, −12 ps·nm−1·km−1 or more but −5 ps·nm−1·km−1 or less at a wavelength of 1550 nm and −17 ps·nm−1·km−1 or more but −6 ps·nm−1·km−1 or less at a wavelength of 1620 nm. This optical fiber can compensate the dispersions of 1380 nm zero-dispersion fiber over the entire wavelength in this range.Type: GrantFiled: December 11, 2000Date of Patent: December 3, 2002Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takatoshi Kato, Masashi Onishi, Yuji Kubo
-
Patent number: 6465099Abstract: A process of producing a vinyl chloride fiber with a small fineness having seven-tenth to half of the full luster surface and feel remarkably similar to human hair is provided. The process provides the vinyl chloride fiber comprising a vinyl chloride resin composition obtained by formulating (a) 1-35 parts by weight of ethylene-vinyl acetate resin, (b) 0.2-5.0 parts by weight of thermal stabilizer, and (c) 0.2-5.0 parts by weight of lubricant to 100 parts of a vinyl chloride mixture consisting of 100-60% by weight of a vinyl chloride resin and 0-40% by weight of chlorinated vinyl chloride resin. The process also provides the vinyl chloride fiber obtained by melt spinning the resin composition described above. The vinyl chloride fiber is useful for an artificial hair fiber for the decoration of hair or a doll's hair fiber such as a doll hair.Type: GrantFiled: June 4, 2001Date of Patent: October 15, 2002Assignee: Kaneka CorporationInventors: Kazumasa Yamane, Hiroshi Yokoyama, Yuji Kubo, Ikuo Okino
-
Publication number: 20020119811Abstract: A plurality of player characters are displayed simultaneously. Switches including at least one of a plurality of orientation input means are assigned to the respective player characters. At least one of the plurality of player characters has a first mode in which the player character operates in accordance with inputs made by the switches assigned to the player character, and a second mode in which the player character operates in accordance with a predetermined sub-program. Switching between the first and second modes is effected when there is performed input operation by any one of switches assigned to the player characters.Type: ApplicationFiled: January 17, 2002Publication date: August 29, 2002Applicant: KONAMI CORPORATIONInventors: Makoto Yabe, Hiroki Satoyoshi, Yuji Kubo
-
Publication number: 20020051612Abstract: The present invention relates to an optical fiber comprising a structure enabling WDM transmissions by utilizing the whole wavelength range of 1300 nm to 1625 nm as a signal wavelength band. In the optical fiber according to the present invention, the transmission loss is 0.4 dB/km or less at a wavelength of 1310 nm, 0.4 dB/km or less at a wavelength of 1383 nm, and 0.3 dB/km or less at a wavelength of 1550 nm. The chromatic dispersion is 0.1 ps/nm/km or more but 5.5 ps/nm/km or less at a wavelength of 1383 nm, and 0.1 ps/nm/km or more but 16.5 ps/nm/km or less in the wavelength range of 1530 nm to 1565 nm. The cut off wavelength at a length of 22 m is 1300 nm or less, and the absolute value of dispersion slope in the wavelength range of 1300 nm to 1625 nm is 0.1 ps/nm2/km or less.Type: ApplicationFiled: October 23, 2001Publication date: May 2, 2002Applicant: Sumitomo Electric Industries, Ltd.Inventors: Makoto Shimizu, Yuji Kubo, Kazuya Kuwahara
-
Patent number: 6328636Abstract: A cold-gas-blow-cooling type machining apparatus in which a cold gas blow is provided to cool a machining tool and a workpiece while the workpiece is machined by the machining tool. The machining apparatus includes: a rectifying device which rectifies the machining tool; a workpiece-temperature detecting device which detects a temperature of the workpiece; and a rectifying-device control device which controls an operation of the rectifying device on the basis of the temperature of the workpiece which is detected by the workpiece-temperature detecting device.Type: GrantFiled: June 26, 2000Date of Patent: December 11, 2001Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takayuki Yoshimi, Naoto Ono, Ryohei Mukai, Yasunori Kobayashi, Masaaki Sato, Tadashi Kumazawa, Yuji Kubo, Masanori Matsumoto
-
Publication number: 20010048539Abstract: The invention relates to an optical transmission system having the structure of effectively suppressing variation in cumulative chromatic dispersion in an optical fiber transmission line from a transmitter to a receiver, thereby enabling large-capacity phototransmission. The optical transmission system according to the invention monitors variation of chromatic dispersion in the optical fiber transmission line and compensates for the variation of chromatic dispersion, thereby suppressing the variation of cumulative chromatic dispersion on the whole of the optical fiber transmission line. The variation of chromatic dispersion is calculated by monitoring temperature variation of the optical fiber transmission line or by letting monitor light propagate in a dummy fiber transmission line disposed in parallel to the optical fiber transmission line.Type: ApplicationFiled: June 1, 2001Publication date: December 6, 2001Applicant: Sumitomo Electric Industries, Inc.Inventors: Yuji Kubo, Yoshiaki Terasawa