Patents by Inventor Bong Wan Lee

Bong Wan Lee 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: 20190381187
    Abstract: Disclosed are a ceria nanocomposite for biomedical treatment, including a ceria nanoparticle; and a pharmaceutical composition. The disclosed ceria nanocomposite for biomedical treatment includes a ceria nanoparticle and a surface modification layer arranged on the surface of the ceria nanoparticle, wherein the surface modification layer includes a polyethylene glycol residue, and in the ceria nanoparticle, the content of Ce3+ is greater than the content of Ce4+.
    Type: Application
    Filed: January 11, 2017
    Publication date: December 19, 2019
    Applicant: Cenyx Biotech Inc.
    Inventors: Seung-Hoon Lee, Han-Gil Jeong, Do Yeon Kim, Dong-Wan Kang, Jaeyun Kim, Bong Geun Cha
  • Publication number: 20190310038
    Abstract: An ammunition supply system includes a weapon mounted on an exterior of a fighting vehicle; a magazine loading unit mounted on the exterior of the fighting vehicle and configured to load a magazine for the weapon; a hatch unit configured to form an entrance to allow a combatant to enter and exit the fighting vehicle; and a hatch lifting unit configured to supply power to the hatch unit to move in a vertical direction with respect to the fighting vehicle. The hatch unit includes: a hatch door unit through which the combatant enters and exits the fighting vehicle, and a hatch passage part forming a passage for connecting the hatch door unit and an interior of the fighting vehicle. The hatch passage part includes a first opening facing the magazine loading unit so that the magazine is transferred from the interior of the fighting vehicle to the magazine loading unit without the combatant being exposed to the exterior of the fighting vehicle.
    Type: Application
    Filed: October 16, 2018
    Publication date: October 10, 2019
    Applicant: HANWHA LAND SYSTEMS CO., LTD.
    Inventors: Bong Kyung SUK, Kang Il LEE, Joo Wan HWANG
  • Patent number: 10415908
    Abstract: An ammunition supply system includes a weapon mounted on an exterior of a fighting vehicle; a magazine loading unit mounted on the exterior of the fighting vehicle and configured to load a magazine for the weapon; a hatch unit configured to form an entrance to allow a combatant to enter and exit the fighting vehicle; and a hatch lifting unit configured to supply power to the hatch unit to move in a vertical direction with respect to the fighting vehicle. The hatch unit includes: a hatch door unit through which the combatant enters and exits the fighting vehicle, and a hatch passage part forming a passage for connecting the hatch door unit and an interior of the fighting vehicle. The hatch passage part includes a first opening facing the magazine loading unit so that the magazine is transferred from the interior of the fighting vehicle to the magazine loading unit without the combatant being exposed to the exterior of the fighting vehicle.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: September 17, 2019
    Assignee: HANWHA DEFENSE CO., LTD.
    Inventors: Bong Kyung Suk, Kang Il Lee, Joo Wan Hwang
  • Publication number: 20190240161
    Abstract: Provided are a ceria nanocomposite including a ceria nanoparticle for treating subarachnoid hemorrhage, a method of preparing the same, and a pharmaceutical composition including the ceria nanocomposite. The ceria nanocomposite for treating subarachnoid hemorrhage disclosed herein includes a ceria nanoparticle and a surface modified layer disposed on a surface of the ceria nanoparticle, wherein the surface modified layer includes a polyethylene glycol residue.
    Type: Application
    Filed: October 21, 2016
    Publication date: August 8, 2019
    Applicants: Cenyx Biotech Inc., Seoul National University Hospital, Research & Business Foundation Sungkyunkwan University
    Inventors: Seung-Hoon Lee, Han-Gil Jeong, Do Yeon Kim, Dong-Wan Kang, Jaeyun Kim, Bong Geun Cha
  • Patent number: 8233144
    Abstract: An optical cable identification apparatus for identifying an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from outside the optical cable. An optical unit transmits two optical signals to a single strand of optical fiber inside the optical cable, and detects a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside. A single-fiber ending unit generates the time difference. A signal processing unit removes noise from the two reflected optical signals and demodulates the optical signals. A sound output unit outputs the optical signals from the signal processing unit as sounds.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: July 31, 2012
    Assignee: Fiberpro, Inc.
    Inventors: Bong Wan Lee, Ho Jin Jeong, Yun Sook Lee
  • Publication number: 20110102773
    Abstract: An optical cable identification apparatus is disclosed. The optical cable identification apparatus capable of identity an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from an outside. An optical unit transmits two optical signals to a single strand of optical fiber inside the optical cable, and detects a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside. A single-fiber ending unit generates the time difference. A signal processing unit removes noise from the two reflected optical signals and demodulates the optical signals. A sound output unit outputs the optical signals from the signal processing unit as sounds.
    Type: Application
    Filed: April 4, 2008
    Publication date: May 5, 2011
    Inventors: Bong Wan Lee, Ho Jin Jeong, Yun Sook Lee
  • Patent number: 7505643
    Abstract: In order to identify an optical cable for optical communication from a remote place, a Sagnac interferometer including two strands of an optical fiber is formed in the optical cable, and a worker in the remote place applies a disturbance of a popping sound to an optical cable to be identified. The disturbance applied by the worker is detected and regenerated in the form of a sound. The optical cable can be easily identified by comparing the regenerated signal and the disturbed signal in the remote place to thereby prevent an incorrect optical cable from being cut. In addition, the optical cable can be more precisely identified by selecting a different light detecting frequency component in accordance with environment conditions.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: March 17, 2009
    Assignee: KT Corporation
    Inventors: Yong-Gi Lee, Kyeong-Mo Youn, Hyun-Ho Jeong, Kyoung-Seon Min, Ho-Jin Jeong, Bong-Wan Lee
  • Publication number: 20070196058
    Abstract: In order to identify an optical cable for optical communication from a remote place, a Sagnac interferometer including two strands of an optical fiber is formed in the optical cable, and a worker in the remote place applies a disturbance of a popping sound to an optical cable to be identified. The disturbance applied by the worker is detected and regenerated in the form of a sound. The optical cable can be easily identified by comparing the regenerated signal and the disturbed signal in the remote place to thereby prevent an incorrect optical cable from being cut. In addition, the optical cable can be more precisely identified by selecting a different light detecting frequency component in accordance with environment conditions.
    Type: Application
    Filed: August 23, 2006
    Publication date: August 23, 2007
    Inventors: Yong-Gi Lee, Kyeong-Mo Youn, Hyun-Ho Jeong, Kyoung-Seon Min, Ho-Jin Jeong, Bong-Wan Lee
  • Patent number: 6657709
    Abstract: Disclosed is an apparatus and method for measuring a changing amount of insertion loss of an optical device depending on a polarization state of an incident light, i.e., a polarization-dependent loss. An incident light that is periodically subject to all polarization states passes through a testing optical device by a polarization scrambler including a piezoelectric element type optical fiber birefringence modulator, and an optical detector measures intensity of the passing light, in which the measured intensity values are averaged for birefringence modulation having a constant period, and then the polarization-dependent loss is computed from a ratio of maximum power to minimum power for the period. Use of the birefringence modulator shortens measuring time, and decreases an affect of external disturbance to the incident light that is incident into the testing optical component or occurrence probability of the external disturbance, so that the polarization-dependent loss can be precisely measured.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: December 2, 2003
    Assignee: Donam Systems Inc.
    Inventors: Yeon Wan Koh, Bong Wan Lee, Jung Won Kim
  • Patent number: 6654121
    Abstract: An apparatus and method for detecting the state of polarization (SOP). The apparatus of the present invention includes a phase retarder and a polarizer which rotate with different speeds. In the method of the present invention, optical signals passed through the rotating phase retarder and the rotating polarizer are detected and their harmonic components related to rotating frequencies of phase retarder and polarizer are analyzed, which gives the Stokes parameters representing the state of polarization. According to the present invention, the amount of phase retardation at the phase retarder can be obtained together with the state of polarization using frequency component analysis, reducing measurement errors. The present invention has advantages in SOP measurement of wide wavelength range, increasing the measurement accuracy.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: November 25, 2003
    Assignee: Donam Systems Inc.
    Inventors: Ho Jin Jeong, Bong Wan Lee
  • Patent number: 6621968
    Abstract: The present invention relates to an optical fiber having a normalized frequency applicable to a broadband optical device, and to a broadband, polarization-independent, low-loss optical fiber device made by using the aforementioned optical fiber. The optical fiber of the present invention has a normalized frequency value V, structural parameters of which including a core radius, a core refractive index and a cladding refractive index are adjusted to minimize the beat dispersion between first and second modes in a predetermined frequency range. Various optical fiber devices may be achieved if the aforementioned optical fiber is used along with acoustic wave generating means and a mode dropper or a mode selective coupler.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: September 16, 2003
    Assignee: Ultraband Fiber Optics, Inc.
    Inventors: Yeon Wan Koh, Jin Ha Kim, Bong Wan Lee, Seok Hyun Yun, Byoung Yoon Kim, Kyung Hwan Oh
  • Publication number: 20030111998
    Abstract: Disclosed is an apparatus and method for measuring a changing amount of insertion loss of an optical device depending on a polarization state of an incident light, i.e., a polarization-dependent loss. An incident light that is periodically subject to all polarization states passes through a testing optical device by a polarization scrambler including a piezoelectric element type optical fiber birefringence modulator, and an optical detector measures intensity of the passing light, in which the measured intensity values are averaged for birefringence modulation having a constant period, and then the polarization-dependent loss is computed from a ratio of maximum power to minimum power for the period. Use of the birefringence modulator shortens measuring time, and decreases an affect of external disturbance to the incident light that is incident into the testing optical component or occurrence probability of the external disturbance, so that the polarization-dependent loss can be precisely measured.
    Type: Application
    Filed: November 15, 2002
    Publication date: June 19, 2003
    Inventors: Yeon Wan Koh, Bong Wan Lee, Jung Won Kim
  • Patent number: 6535665
    Abstract: An acousto-optic filter includes an optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes. At least one acoustic wave generator is included and made of a sufficiently high frequency piezoelectric material to produce a longitudinal acoustic wave. An acoustic wave propagation member has proximal and distal ends. The distal end is coupled to the optical fiber and the proximal end is coupled to the acoustic wave generator. The acoustic wave propagation member propagates the longitudinal acoustic wave from the proximal to the distal ends and excites the longitudinal acoustic wave in the optical fiber.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: March 18, 2003
    Assignee: Novera Optics, Inc.
    Inventors: Byoung Yoon Kim, Seok Hyun Yun, Bong Wan Lee, Wayne Sorin
  • Patent number: 6532323
    Abstract: An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: March 11, 2003
    Assignee: Novera Optics, Inc.
    Inventors: Byoung Yoon Kim, Seok Hyun Yun, Bong Wan Lee
  • Patent number: 6377351
    Abstract: A fiber-optic laser gyroscope having phase sensitive detecting means which can reduce rotation rate measurement errors. In the fiber-optic laser gyroscope, errors due to the relative intensity difference between two consecutive pulses, which was an error factor in rotation rate measurement through time interval measurement between two adjacent pulses, can be eliminated by having a phase sensitive detection means which may extract and detect only components having the same phase as that of a phase-modulated signal from components having the same frequency as that of a phase-modulated signal. An output from the phase sensitive detecting means has an additional characteristic of being linearly proportional to rotation rate. The fiber-optic laser gyroscope of the present invention, therefore, has a characteristic of a relatively simple signal processing compared to conventional interferometric fiber gyroscopes.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: April 23, 2002
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Byoung Yoon Kim, Jong Bum Hong, Young Bae Yeo, Bong Wan Lee
  • Patent number: 6266462
    Abstract: An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: July 24, 2001
    Assignee: Ultraband Fiber Optics
    Inventors: Byoung Yoon Kim, Seok Hyun Yun, Bong Wan Lee
  • Patent number: 6266456
    Abstract: An optical fiber polarization scrambler decreasing the degree of polarization (DOP) of light efficiently using at least two optical fiber birefringence modulators (10, 11) and an operating parameter input method for the same. Birefringence modulators are constructed with hollow cylindrical piezo devices (10, 11) and a strand of optical fiber (30) wound continuously on the outer walls of the piezo devices (10, 11). An angle between the birefringence modulators consisting of the optical fiber polarization scrambler is configured to compensate the effect of circular birefringence. A method for exactly configuring birefringence modulation frequency and birefringence modulation amplitude to achieve effective polarization scrambling for the optical fiber polarization scrambler is also provided.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: July 24, 2001
    Assignee: Donam Systems Inc.
    Inventors: Bong Wan Lee, Yeon Wan Koh, Young Bae Yeo, Byoung Yoon Kim
  • Publication number: 20010005439
    Abstract: An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
    Type: Application
    Filed: December 14, 2000
    Publication date: June 28, 2001
    Inventors: Byoung Yoon Kim, Seok Hyun Yun, Bong Wan Lee
  • Patent number: 6253002
    Abstract: An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: June 26, 2001
    Assignee: Ultraband Fiber Optics
    Inventors: Byoung Yoon Kim, Seok Hyun Yun, Bong Wan Lee
  • Patent number: 6233379
    Abstract: An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: May 15, 2001
    Assignee: Ultraband Fiber Optics
    Inventors: Byoung Yoon Kim, Seok Hyun Yun, Bong Wan Lee