Patents by Inventor Young Sang Jeon
Young Sang Jeon 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: 11981751Abstract: Disclosed are a nanobarcode for controlling adhesion and polarization of macrophages and a method of controlling adhesion and polarization of macrophages by using nanobarcodes. The method of controlling adhesion and polarization of macrophages of the present invention may efficiently control adhesion and phenotypic polarization of macrophages in vivo or in vitro by tuning periodicity and sequences of ligand peptide (RGD) of a nanobarcode.Type: GrantFiled: April 30, 2021Date of Patent: May 14, 2024Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Heemin Kang, Young Keun Kim, Sunhong Min, Yoo Sang Jeon, Hyojun Choi
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Patent number: 7884667Abstract: A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of the envelop signal; a control signal generator for converting the modulated envelop signal into a control signal; an automatic gain adjuster for equalizing pulse height of the modulated envelop signal; a mixer for mixing the phase signal with the output of the automatic gain adjustor to produce a RF pulse train; a power amplifier for amplifying the RF pulse train, to generate an amplified RF pulse train; and a band pass filter for restoring the original input signal from the amplified RF pulse train. The output level of the power amplifier is controlled by the control signal.Type: GrantFiled: January 19, 2007Date of Patent: February 8, 2011Assignee: Seoul National University Industry FoundationInventors: Sang-Wook Nam, Young-Sang Jeon
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Publication number: 20090273396Abstract: A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of the envelop signal; a control signal generator for converting the modulated envelop signal into a control signal; an automatic gain adjuster for equalizing pulse height of the modulated envelop signal; a mixer for mixing the phase signal with the output of the automatic gain adjustor to produce a RF pulse train; a power amplifier for amplifying the RF pulse train, to generate an amplified RF pulse train; and a band pass filter for restoring the original input signal from the amplified RF pulse train. The output level of the power amplifier is controlled by the control signal.Type: ApplicationFiled: January 19, 2007Publication date: November 5, 2009Applicant: Seoul National University Industry FoundationInventors: Sang-Wook Nam, Young-Sang Jeon
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Patent number: 7134634Abstract: The present invention relates to a column unit which connects a chair sheet to a base in which a wheel is installed. The present invention provides a column unit which comprises a base tube having a lower end portion vertically fixed to a base of a chair and having the hollow interior; a spindle having the interior filled with a pressure gas and divided to upper and lower chambers by a piston, an upper end portion of a piston rod being connected to the piston, a lower end portion of the piston rod being rotatably installed at the lower end portion of the inner side of the base tube, the upper and lower chambers are communicated by a bypass, a valve being installed at the bypass; and a guide sleeve installed between the base tube and the spindle and engaged with the spindle to be integrally moved upward and downward together with the spindle.Type: GrantFiled: May 22, 2001Date of Patent: November 14, 2006Assignee: Samhongsa Co., Ltd.Inventors: Young-Sang Jeon, In-Sun Jang
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Patent number: 7134379Abstract: Disclosed is a gas cylinder, for improving sealing characteristics of the gas cylinder and improving convenience in manufacturing, including: a valve having a gas opening/closing pin at a through hole in its center, for intermittently passing a gas, and additionally having a valve dividing body seated on a groove approximately in a lower part of the through hole; a spindle to an upper inside of which the valve is inserted; and a piston inserted to an inside of an open cylinder of the spindle, and having, a step threshold formed at a predetermined distance from an upper end, to which an O-ring for maintaining sealing is fit, and having another step threshold ranging from a lower side of the step threshold to a lower end on an inner lateral surface of the piston, to which an O-ring is fit.Type: GrantFiled: June 27, 2003Date of Patent: November 14, 2006Inventors: Young Sang Jeon, Dong Kwan Ma, Ki Cheol Lee
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Patent number: 6840484Abstract: Disclosed is a gas cylinder including: a spindle at least having a flange washer of a cavity shape having a region D1 and a region D2 whose inner diameters are different; a piston inserted to the open inside of the spindle; a piston rod whose one end is fixed in the piston; a base tube having a mounting member on which the lower end of the spindle is mounted with the mounting member inserted to the flange washer; and a pipe holder inserted to the tapered portion in the upper part of the spindle.Type: GrantFiled: June 4, 2003Date of Patent: January 11, 2005Assignee: Sam Hongea Co., Ltd.Inventor: Young Sang Jeon
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Publication number: 20040245831Abstract: Disclosed is a gas cylinder including: a spindle at least having a flange washer of a cavity shape having a region D1 and a region D2 whose inner diameters are different; a piston inserted to the open inside of the spindle; a piston rod whose one end is fixed in the piston; a base tube having a mounting member on which the lower end of the spindle is mounted with the mounting member inserted to the flange washer; and a pipe holder inserted to the tapered portion in the upper part of the spindle.Type: ApplicationFiled: June 4, 2003Publication date: December 9, 2004Inventor: Young Sang Jeon
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Publication number: 20040061367Abstract: Disclosed is a gas cylinder, for improving sealing characteristics of the gas cylinder and improving convenience in manufacturing, including: a valve having a gas opening/closing pin at a through hole in its center, for intermittently passing a gas, and additionally having a valve dividing body seated on a groove approximately in a lower part of the through hole; a spindle to an upper inside of which the valve is inserted; and a piston inserted to an inside of an open cylinder of the spindle, and having, a step threshold formed at a predetermined distance from an upper end, to which an O-ring for maintaining sealing is fit, and having another step threshold ranging from a lower side of the step threshold to a lower end on an inner lateral surface of the piston, to which an O-ring is fit.Type: ApplicationFiled: June 27, 2003Publication date: April 1, 2004Inventors: Young Sang Jeon, Dong Kwan Ma, Ki Cheol Lee
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Publication number: 20020109052Abstract: The present invention relates to a column unit which connects a chair sheet to a base in which a wheel is installed. The present invention provides a column unit which comprises a base tube having a lower end portion vertically fixed to a base of a chair and having the hollow interior; a spindle having the interior filled with a pressure gas and divided to upper and lower chambers by a piston, an upper end portion of a piston rod being connected to the piston, a lower end portion of the piston rod being rotatably installed at the lower end portion of the inner side of the base tube, the upper and lower chambers are communicated by a bypass, a valve being installed at the bypass; and a guide sleeve installed between the base tube and the spindle and engaged with the spindle to be integrally moved upward and downward together with the spindle.Type: ApplicationFiled: May 22, 2001Publication date: August 15, 2002Inventors: Young-Sang Jeon, In-Sun Jang