Patents by Inventor Byung H. Lee
Byung H. 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).
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Patent number: 6760502Abstract: A method and apparatus for measuring optical power or insertion loss within an optical cross-connect system utilizing a plurality of parallel light beams sampled at switch fabric input and output portions via imaging devices.Type: GrantFiled: December 4, 2001Date of Patent: July 6, 2004Assignee: Lucent Technologies Inc.Inventors: Ronald J. Capik, Byung H. Lee
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Publication number: 20030103716Abstract: A method and apparatus for measuring optical power or insertion loss within an optical cross-connect system utilizing a plurality of parallel light beams sampled at switch fabric input and output portions via imaging devices.Type: ApplicationFiled: December 4, 2001Publication date: June 5, 2003Applicant: LUCENT TECHNOLOGIES INC.Inventors: Ronald J. Capik, Byung H. Lee
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Patent number: 6528678Abstract: A phosgene-free method for preparing a carbamate from a compound containing an amine group involves reacting the compound with an alkylating agent in the presence of carbon dioxide and cesium carbonate. A reaction can take place under standard pressure and temperature conditions and produces carbamates in a high yield with low by-product formation.Type: GrantFiled: October 24, 2001Date of Patent: March 4, 2003Assignee: Pharmacia& Upjohn CompanyInventor: Byung H. Lee
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Publication number: 20020120140Abstract: A phosgene-free method for preparing a carbamate from a compound containing an amine group involves reacting the compound with an alkylating agent in the presence of carbon dioxide and cesium carbonate. A reaction can take place under standard pressure and temperature conditions and produces carbamates in a high yield with low by-product formation.Type: ApplicationFiled: October 24, 2001Publication date: August 29, 2002Inventor: Byung H. Lee
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Publication number: 20010038471Abstract: In a telecommunications network, such as an optical mesh network, at a node along a service path satisfying a demand from a start node to an end node, the node can detect a failure in the service path by any of three different ways: (a) by monitoring incoming payload signals from its previous node along the service path for a loss-of-signal (LOS) condition; (b) by monitoring the incoming payload signals from its previous node along the service path for an in-band alarm indication signal; and (c) by monitoring an out-of-band signaling channel for a failure message transmitted from its previous node along the service path. The node then determines appropriate actions as part of a distributed restoration procedure depending on whether the node is an intermediate node or the end node along the service path. If the node is an intermediate node, then the node passes the out-of-band failure message to its next node along the service path.Type: ApplicationFiled: January 5, 2001Publication date: November 8, 2001Inventors: Niraj Agrawal, Neil A. Jackman, Steven K. Korotky, Byung H. Lee, Eric S. Tentarelli, Liyan Zhang
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Patent number: 6005998Abstract: A scalable, non-blocking fiber optic matrix switch has two arrays of light beam collimators arranged to face one another in free space, and a number of optical fibers coupled to each of the arrays. Each collimator has a tubular body with a fiber receiving part at one end, and a lens mounting part at an opposite end of the body. A lens fixed in the mounting part produces a collimated light beam from light emitted from an end of an optical fiber inserted in the fiber receiving part. First and second motor assemblies with corresponding positioning elements displace the collimator body so that its light beam is steered to a desired position along "X" and "Y" axes in response to operation of the motor assemblies. A signal carried on a fiber entering a first collimator in one array can be switched into a fiber of a second collimator in the opposite array, by displacing the collimators so as to direct the beam of the first collimator to align with a lens axis of the second. For an N.times.Type: GrantFiled: February 20, 1998Date of Patent: December 21, 1999Assignee: Lucent Technologies Inc.Inventor: Byung H. Lee
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Patent number: 5886180Abstract: The present invention are marefortines and paraherquamides where the 7-member oxygenated ring has been modified to produce 25-methylene compounds (VII) and 24,25-epoxy compounds (VIII) all of which are useful as antiparasitic agents against endo and ecto parasites, particularly helminths and arthropods.Type: GrantFiled: September 5, 1997Date of Patent: March 23, 1999Assignee: Pharmacia & Upjohn CompanyInventors: Byung H. Lee, Michael F. Clothier
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Patent number: 5776936Abstract: There are disclosed 18-thiomarcfortine derivatives of the natural products marcfortine A, B and C, C-18 thioparaherquamide and derivatives thereof, novel N-1 marcfortines A, B, and C and derivatives thereof, novel N-1 paraherquamide and derivatives thereof usefull in the treatment and prevention of helninth and arthropod infections of animals and plants.Any inquiry concerning this communication or earlier communications from the examiner should be directed to Examiner Robert T. Bond whose telephone number is (703)308-4711. The examiner can normally be reached on Monday through Friday from 8:00 AM to 4:30 PM.Type: GrantFiled: May 19, 1994Date of Patent: July 7, 1998Assignee: Pharmacia & Upjohn CompanyInventors: Byung H. Lee, Stephen J. Nelson
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Patent number: 5776950Abstract: This invention comprises novel compounds that inhibit the growth of helminths. The compounds have the structure of Formula I, below. ##STR1## Where the R groups are defined according to the specification and claims.Type: GrantFiled: September 5, 1996Date of Patent: July 7, 1998Assignee: Pharmacia & Upjohn CompanyInventors: Byung H. Lee, Pil H. Lee, William W. McWhorter, Jr., Fred E. Dutton
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Patent number: 5750695Abstract: The present invention includes various substituted and paraherquamides, exemplified by the 14-hydroxy-2-deoxoparaherquamide B of formula (XXV) which are useful as antiparasitic agents.Type: GrantFiled: March 21, 1997Date of Patent: May 12, 1998Assignee: Pharmacia & Upjohn CompanyInventors: Byung H. Lee, Michael F. Clothier
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Patent number: 5750533Abstract: There are disclosed 14.alpha.-hydroxymarcfortine derivatives of the natural products marcfortine A, B, C, and D useful in the treatment and prevention of helminth and arthropod infections of animals and plants. The synthetic derivatives are of Formula (I).Type: GrantFiled: December 7, 1995Date of Patent: May 12, 1998Assignee: Pharmacia & Upjohn CompanyInventor: Byung H. Lee
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Patent number: 5703078Abstract: The present invention includes various substituted marcfortines of the type exemplfied by the compounds of formula ##STR1## and paraherquamides which are useful as antiparasitic agents.Type: GrantFiled: June 27, 1996Date of Patent: December 30, 1997Assignee: Pharmacia & Upjohn CompanyInventors: Byung H. Lee, Michael F. Clothier
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Patent number: 5493029Abstract: The present invention relates to novel benzopyran derivatives of formula (I) which have exellent effectiveness in the treatment of asthma as well as hypertension. ##STR1## wherein: R.sub.1 is --CN, --NO.sub.2, --OCX.sub.1 X.sub.2 X.sub.3, --NH.sub.2, --NHSO.sub.2 R.sup.A, ##STR2## --SO.sub.2 R.sup.C or --SO.sub.2 NR.sup.C R.sup.D wherein X.sub.1, X.sub.2 and X.sub.3 are, each independently, F, Cl or H, except for that X.sub.1, X.sub.2 and X.sub.3 may not be hydrogen atom simulaneously; R.sup.A and R.sup.B are, each independently, a hydrogen atom, or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group; and R.sup.C and R.sup.D are, each independently, a hydrogen atom or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group;R.sub.2 is a C.sub.1-4 straight or branched alkyl group;R.sub.3 is a C.sub.Type: GrantFiled: December 9, 1993Date of Patent: February 20, 1996Assignee: Korea Research Institute of Chemical TechnologyInventors: Sung-Eun Yoo, Kyu Y. Yi, Nak C. Jeong, Jee H. Suh, Seon-Ju Kim, Hwa-Sup Shin, Byung H. Lee, Kyu S. Jung
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Patent number: 5420729Abstract: Automatic head cleaning apparatus and method for checking insensitivity of a VCR video head and for performing a head cleaning operation for a predetermined period. When the insensitivity of the video head is not corrected even after the head cleaning operation for the predetermined period, the VCR tape is ejected. Simultaneously, an alarm notifying a failure of the VCR is activated. A VCR head cleaner is also provided that is in close contact with a VCR drum head due to a magnetic reluctance force during the head cleaning operation. The VCR head cleaner prevents the video head from being subjected to adverse impact and frictional force, and is easily installed requiring no additional space within the VCR. Furthermore, the cleaning operation is automatically completed.Type: GrantFiled: August 16, 1994Date of Patent: May 30, 1995Assignee: Gold Star Co., Ltd.Inventors: Byung H. Lee, Man S. Park, Jong H. Kim
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Patent number: 5300511Abstract: The present invention relates to novel benzopyran derivatives of formula(I) which have exellent effectiveness in the treatment of asthma as well as hypertension. ##STR1## wherein R.sub.1 is --CN, --NO.sub.2, --OCX.sub.1 X.sub.2 X.sub.3, --NH.sub.2, --NHSO.sub.2 R.sup.A, ##STR2## --SO.sub.2 R.sup.C or --SO.sub.2 NR.sup.C R.sup.D wherein X.sub.1, X.sub.2 and X.sub.3 are, each independently, F, Cl or H, except for that X.sub.1, X.sub.2 and X.sub.3 may not be hydrogen atom simulaneously; R.sup.A and R.sup.B are, each independently, a hydrogen atom, or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group; and R.sup.C and R.sup.D are, each independently, a hydrogen atom or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group;R.sub.2 is a C.sub.1-4 straight or branched alkyl group;R.sub.3 is a C.sub.Type: GrantFiled: May 21, 1992Date of Patent: April 5, 1994Assignee: Korea Research Institute of Chemical TechnologyInventors: Sung-Eun Yoo, Kyu Y. Yi, Nak C. Jeong, Jee H. Suh, Seon-Ju Kim, Hwa-Sup Shin, Byung H. Lee, Kyu S. Jung
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Patent number: 5255330Abstract: A facility is provided which determines the optimum phase of a sample clock signal that is used to acquire a copy of an image containing text. In particular, the phase of the sample signal is set to an initial value and is thereafter incremented by a predetermined amount of time following the acquistion of each of a predetermined number of copies of the image, in which each such copy is defined by respective pixel values. Upon acquiring a current copy of the image, a histogram is formed from ones of the pixel values and is stored in memory in place of a priorly stored histogram if the latest histogram contains more pixel values indicative of text than the priorly stored histogram. The phase of the sample clock signal is then adjusted to the phase associated with the histogram that is stored in memory following the last of such acquisitions.Type: GrantFiled: October 3, 1990Date of Patent: October 19, 1993Assignee: AT&T Bell LaboratoriesInventors: Tu-Chuong Huynh, Byung H. Lee
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Patent number: 5239000Abstract: Thermoplastic elastomers in which low molecular weight ethylene/propylene/nonconjugated diene rubber ("liquid" EPDM rubber) replaces part of the high molecular weight EPDM rubber used in conventional blends exhibit better tension set properties than conventional blends in which liquid EPDM rubber is not used. A masterbatch containing liquid EPDM rubber and phenolic curing resin which is added to a mixture of polyolefin, high molecular weight EPDM rubber, and other ingredients during mixing results in a thermoplastic elastomer having better mechanical properties as well as better tension set properties than blends of conventional materials.Type: GrantFiled: June 21, 1991Date of Patent: August 24, 1993Assignee: Yukong LimitedInventors: Myung H. Kim, Byung H. Lee
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Patent number: 5236935Abstract: The present invention relates to novel benzopyran derivatives of formula (I) which have superior selectivity in the treatment of hypertension by lowering blood pressure with a relaxation activity on vascular smooth muscle. The present invention also relates to processes for preparing such compounds; and to a pharmaceutical compositions containing such compounds as an active ingredient. ##STR1## wherein: R.sub.1 is --CN, --NO.sub.2, --OCX.sub.1 X.sub.2 X.sub.3, --NH.sub.2, --NHSO.sub.2 R.sup.A, ##STR2## --SO.sub.2 R.sup.C or --SO.sub.2 NR.sup.C R.sup.D wherein X.sub.1, X.sub.2 and X.sub.3 are, each independently, a fluorine, chlorine or hydrogen atom; R.sup.A and R.sup.B are, each independently, an amino, C.sub.1-6 alkoxy, C.sub.1-6 alkyl group or an optionally substituted phenyl group; and R.sup.C and R.sup.D are a hydrogen atom, or a C.sub.1-6 alkyl group or an optionally substituted phenyl group with a halogen atom, or a straight or branched C.sub.1-3 alkyl group;R.sub.2 is ##STR3## wherein R.sup.Type: GrantFiled: May 21, 1992Date of Patent: August 17, 1993Assignee: Korea Research Institute of Chemical TechnologyInventors: Sung-Eun Yoo, Kyu Y. Yi, Nak C. Jeong, Jee H. Suh, Seon-Ju Kim, Hwa-Sup Shin, Byung H. Lee, Kyu S. Jung
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Patent number: 5218694Abstract: A dual selection system for a reference frequency for use in a clock comprising a microcomputer for controlling the whole system and outputting a switching signal and frequency-demultiplying signals. A system oscillator produces an oscillation signal of 4.194304 MHz. A system frequency-demultiplier for frequency-dividing an output of a first buffer to apply a system clock signal to the microcomputer. A clock oscillator produces an oscillation signal of 32.768 KHz, and a clock frequency-demultiplier for frequency-dividing an output of a second buffer applies a clock signal of 1 Hz for clock to the microcomputer.When an option is selected, a system oscillation signal of 4.194304 MHz is selected and frequency-demultiplied by 2.sup.22 to a clock signal of 1 Hz for a clock. When that the option is not selected, the clock oscillation signal of 32.768 KHz is frequency-divided by 2.sup.15 to a clock signal of 1 Hz for the clock.Type: GrantFiled: July 29, 1991Date of Patent: June 8, 1993Assignee: Goldstar Co., Ltd.Inventor: Byung H. Lee
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Patent number: 5206497Abstract: An optical switching apparatus wherein one or more information-bearing collimated laser beams are each launched into free-space and directed onto a selected photo-receptor to effect an optical cross-connection. Each launched beam is split into two separate components: a payload component, and a monitor component. The payload component of the beam is directed toward a photo-receptor, and the monitor component is directed toward a photo-sensor. The direction in which a particular information-bearing beam is launched is controlled in response to feedback received from the photo-sensor as a function of the position the monitor component associated with that information-bearing beam.Type: GrantFiled: April 6, 1992Date of Patent: April 27, 1993Assignee: AT&T Bell LaboratoriesInventor: Byung H. Lee