Patents by Inventor Tetsuro Harada

Tetsuro Harada 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).

  • Publication number: 20070035362
    Abstract: A high-frequency composite component for selectively switching a GSM-system signal path and a DCS-system signal path for a signal transmitted to or received from an antenna terminal by a diplexer. Transmission-side input terminals and reception-side balanced output terminals to be switched by high-frequency switches are included in the GSM and the DCS systems. Matching elements include inductors and capacitors that are inserted between the reception-side balanced output terminals and the output side of surface acoustic wave filters.
    Type: Application
    Filed: July 26, 2005
    Publication date: February 15, 2007
    Inventors: Takanori Uejima, Naoki Nakayama, Tetsuro Harada, Kunihiro Koyama
  • Patent number: 6928298
    Abstract: A mobile communication device, preferably in the form of a dual-band cellular phone, includes two communications systems supporting different frequency bands, such as DCS in the 1.8 GHz band and GSM in the 900 MHz band. The mobile communication device includes an antenna, a high-frequency composite unit, DCS and GSM transmitters, and DCS and GSM receivers. The high-frequency composite unit contains a diplexer, DCS and GSM high-frequency switches, DCS and GSM high-frequency filters or notch filters, and a directional coupler.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: August 9, 2005
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Koji Furutani, Takanori Uejima, Tetsuro Harada, Yoshiki Takada, Norio Nakajima
  • Publication number: 20040248539
    Abstract: A high-frequency module includes a switching circuit having a phase-shift circuit. The phase-shift circuit matches only PCS/DCS reception signals so as to be passed therethrough by setting a control-voltage input terminal to a Low level when receiving PCS/DCS signals, and attenuates PCS/DCS transmission signals to the PCS/DCS reception circuit side by setting the control-voltage input terminal to a Hi level when transmitting PCS/DCS signals. Also, another phase-shift circuit, which further attenuates the PCS transmission signal when transmitting the PCS signal, is provided in the DCS Rx terminal side of the phase-shift circuit.
    Type: Application
    Filed: April 6, 2004
    Publication date: December 9, 2004
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Koji Furutani, Tetsuro Harada, Takako Sato
  • Publication number: 20040242189
    Abstract: A high-frequency module includes a diplexer, first and second high-frequency switches, a SAW duplexer, first and second LC filters functioning as first and second filters, and an SAW filter functioning as a third filter. The module defines a unit that integrates front-end sections of first to third communication systems, a digital cellular system (1.8 GHz band), a personal communication service (1.9 GHz band) and a global system for mobile communications (900 MHz band).
    Type: Application
    Filed: June 29, 2004
    Publication date: December 2, 2004
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Koji Furutani, Norio Nakajima, Tetsuro Harada, Yoshiki Takada, Akihiro Ochii
  • Patent number: 6788958
    Abstract: A high-frequency module includes a diplexer, first and second high-frequency switches, a SAW duplexer, first and second LC filters functioning as first and second filters, and an SAW filter functioning as a third filter. The module defines a unit that integrates front-end sections of first to third communication systems, a digital cellular system (1.8 GHz band), a personal communication service (1.9 GHz band) and a global system for mobile communications (900 MHz band).
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: September 7, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Koji Furutani, Norio Nakajima, Tetsuro Harada, Yoshiki Takada, Akihiro Ochii
  • Patent number: 6639489
    Abstract: A high-frequency module prevents distortion in first and second diodes of a high-frequency switch in a communication system which is not selected without providing a negative power source, and a communication apparatus includes such a high-frequency module. The high-frequency module includes a diplexer having inductors and capacitors, and high-frequency switches including first and second diodes, transmission lines, inductors, and capacitors.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: October 28, 2003
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Nobuyoshi Okuda, Tetsuro Harada
  • Publication number: 20030021356
    Abstract: A high-frequency module prevents distortion in first and second diodes of a high-frequency switch in a communication system which is not selected without providing a negative power source, and a communication apparatus includes such a high-frequency module. The high-frequency module includes a diplexer having inductors and capacitors, and high-frequency switches including first and second diodes, transmission lines, inductors, and capacitors.
    Type: Application
    Filed: June 14, 2002
    Publication date: January 30, 2003
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Nobuyoshi Okuda, Tetsuro Harada
  • Publication number: 20020032038
    Abstract: A high-frequency module includes a diplexer, first and second high-frequency switches, a SAW duplexer, first and second LC filters functioning as first and second filters, and an SAW filter functioning as a third filter. The module defines a unit that integrates front-end sections of first to third communication systems, a digital cellular system (1.8 GHz band), a personal communication service (1.9 GHz band) and a global system for mobile communications (900 MHz band).
    Type: Application
    Filed: July 12, 2001
    Publication date: March 14, 2002
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Koji Furutani, Norio Nakajima, Tetsuro Harada, Yoshiki Takada, Akihiro Ochii
  • Publication number: 20010027119
    Abstract: A mobile communication device, preferably in the form of a dual-band cellular phone, includes two communications systems supporting different frequency bands, such as DCS in the 1.8 GHz band and GSM in the 900 MHz band. The mobile communication device includes an antenna, a high-frequency composite unit, DCS and GSM transmitters, and DCS and GSM receivers. The high-frequency composite unit contains a diplexer, DCS and GSM high-frequency switches, DCS and GSM high-frequency filters or notch filters, and a directional coupler.
    Type: Application
    Filed: March 8, 2001
    Publication date: October 4, 2001
    Applicant: Murata Manufacturing Co., Ltd. Nagaokakyo-shi, Japan
    Inventors: Koji Furutani, Takanori Uejima, Tetsuro Harada, Yoshiki Takada, Norio Nakajima
  • Patent number: 4860497
    Abstract: A drill grinder for grinding a point of a drill including a shank, and a body which has the point. The drill grinder includes a holding device for removably holding the drill, and a grinding wheel adapted to be forced on the drill point, and to thereby grind the point while the drill is held by the holding device. The holding device includes a first chuck for gripping the shank of the drill, and a second chuck for gripping the body of the drill. The grinder has a holder mounting device for removably holding the holder device during a grinding operation on the drill by the grinding wheel. The grinder may further includes a drill setting device for removably accommodating the holding device, to position the drill in a predetermined circumferential position relative to the second chuck, prior to the grind operation.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: August 29, 1989
    Assignees: Toyo Machinery Co., Ltd., OSG Corporation
    Inventors: Seiji Ohya, Tetsuro Harada
  • Patent number: 4702927
    Abstract: A method for drying a water retentive substance such as okara which comprises adjusting the shape of a water retentive substance having a water content of 55 to 95% by weight to particles having a particle size of 1.5 to 13 mm and drying by using a novel improved pneumatic conveying drying apparatus comprising a dryer section, a pulverizer section provided at the lower part of the dryer section and a classifier section at the upper part of the dryer section, the substance to be dried being fed to the dryer section at a site at least 500 mm above the pulverizer section. The novel drying apparatus is also provided.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: October 27, 1987
    Assignees: Fuji Oil Company, Ltd., Hosokawa Micron Corporation
    Inventors: Motohiko Hirotsuka, Tetsuro Harada, Nobuhiro Ohtsubo, Hiroyuki Kawade, Yoshiyuki Hayakawa, Hitoshi Taniguchi