Patents by Inventor Wing Chi TANG
Wing Chi TANG 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: 11835466Abstract: A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).Type: GrantFiled: May 24, 2021Date of Patent: December 5, 2023Assignee: Goldway Technology LimitedInventors: Ka Wing Cheng, Kin Wing Wong, Kong Chan, Juan Cheng, Wing Chi Tang, Koon Chung Hui
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Publication number: 20230105070Abstract: A layer for a protective mask (100a, 100b, 200a) comprises at least a first sublayer (122b, 218b), wherein the first sublayer (122b, 218b) includes a first substrate and a layer of a plurality of nanoparticles (124b, 7) of a nanomaterial provided on the first substrate. The protective mask (100a, 100b, 200a) includes an outer layer (120b, 230a) which is made of an organic fibular network bonded with nanomaterials. An air filtration element (900, 1070, 1240) for attenuation of airborne contaminants includes negatively charged nanodiamonds (920, 1320). A filter (1100, 1200, 1500, 1600) for an air conditioning system (1130, 1530) or an air purifier (1230, 1630) comprises the air filtration element (900, 1070, 1240). An air treatment element (1140,1300,1540,1640) comprises nanodiamonds (920,1320) including colour centers.Type: ApplicationFiled: February 11, 2021Publication date: April 6, 2023Applicant: MASTER DYNAMIC LIMITEDInventors: Yau Chuen YIU, Juan CHENG, Chak Yeung AU, Wing Chi TANG, Ching Tom KONG
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Patent number: 11326952Abstract: A process is operable using a computerized system for grading the colour of a diamond using a pre-trained neural network for determination of a colour grading. The computerized system includes an optical image acquisition device, a pre-trained neural network and an output module operably interconnected together via a communication link. The process includes: (i) acquiring via an optical image acquisition device one or more optical image of at least a portion of a diamond; and (ii) in a pre-trained neural network, providing a regressive value associated with the colour grade of the diamond.Type: GrantFiled: July 29, 2020Date of Patent: May 10, 2022Assignee: Goldway Technology LimitedInventors: Koon Chung Hui, Ka Wing Cheng, Wing Chi Tang
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Publication number: 20220026371Abstract: A process of assigning a colour grade to a diamond, including the steps of (i) determining the N3 and C-center content of a diamond (110); (ii) comparing the N3 and C-center content of the diamond with a previously acquired data set from a plurality of diamonds each having a colour grading previously assigned thereto, and (iii) assigning a colour grade to the diamond upon a correlation of the N3 and C-center content of said diamond with a grade of said previously acquired data set; wherein said previously acquired data set comprises a correlation between N3 and C center content and optical absorbance in the visible light spectrum for each diamond of said plurality of diamonds.Type: ApplicationFiled: December 10, 2019Publication date: January 27, 2022Applicant: GOLDWAY TECHNOLOGY LIMITEDInventors: Wing Yan LEE, Juan CHENG, Chun Yan Dominique LAU, Wing Chi TANG, Ka Wng CHENG, Ching Tom KONG, Koon Chung HUI
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Publication number: 20210364446Abstract: A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).Type: ApplicationFiled: May 24, 2021Publication date: November 25, 2021Inventors: Ka Wing CHENG, Kin Wing WONG, Kong CHAN, Juan CHENG, Wing Chi TANG, Koon Chung HUI
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Publication number: 20210310950Abstract: A system (100a) for determining the type of a diamond (130a), the system (100a) comprising a plurality of lasers (110a,120a) for directing light towards a diamond (130a), wherein each laser is of a different wavelength of light; wherein the spectrum of light from the plurality of lasers (110a,120a) extends from ultra-violet to near infra-red; a spectrometer (140a) for collecting luminescence spectrum from the diamond (130a) responsive to inhomogeneities upon light from the lasers (110a,120a) being directed towards the diamond (130a); a processor module (150a) for comparing photoluminescence spectrum collected by the spectrometer (140a) with pre-existing photoluminescence spectrum of known diamond type; and an output module (160a) for providing an output signal indicative of the diamond type of the diamond (130a), upon a predetermined threshold of correlation between the photoluminescence spectrum from the diamond (130a) and the pre-existing photoluminescence spectrum from the diamond (130a) and the pre-existiType: ApplicationFiled: August 1, 2019Publication date: October 7, 2021Applicant: GOLDWAY TECHNOLOGY LIMITEDInventors: Juan CHENG, Chun Hong SHAM, Tat Hang CHUNG, Kong CHAN, Wing Chi TANG, Koon Chung HUI
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Patent number: 11137355Abstract: A process is operable using a computerized system for grading the clarity of a diamond. The computerized system includes an optical image acquisition device, a processor, a pre-trained neural network and an output module operably interconnected together. The process includes: (i) acquiring via an optical image acquisition device one or more plural axial view images of a diamond with different focus depths; (ii) in a processor, combining the plural axial views to form one or more single optical images; (iii) in a pre-trained neural network, providing a regressive value associated with the clarity grade of the diamond based on the one or more single images acquired during step (i); and (iv) from an output module, providing a clarity grade to the diamond (i) by correlating the regression value from (ii) to a clarity grade.Type: GrantFiled: July 29, 2020Date of Patent: October 5, 2021Assignee: Goldway Technology LimitedInventors: Koon Chung Hui, Ka Wing Cheng, Wing Chi Tang
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Publication number: 20210268123Abstract: A conjugate comprising at least one calcineurin phosphatase inhibitor and a nanodiamond.Type: ApplicationFiled: June 21, 2019Publication date: September 2, 2021Applicant: MASTER DYNAMIC LIMITEDInventors: Ka Wing CHENG, Wing Chi TANG, Koon Chung HUI
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Patent number: 11016033Abstract: A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).Type: GrantFiled: December 28, 2018Date of Patent: May 25, 2021Assignee: Goldway Technology LimitedInventors: Ka Wing Cheng, Kin Wing Wong, Kong Chan, Juan Cheng, Wing Chi Tang, Koon Chung Hui
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Publication number: 20210033465Abstract: A process is operable using a computerized system for grading the colour of a diamond using a pre-trained neural network for determination of a colour grading. The computerized system includes an optical image acquisition device, a pre-trained neural network and an output module operably interconnected together via a communication link. The process includes: (i) acquiring via an optical image acquisition device one or more optical image of at least a portion of a diamond; and (ii) in a pre-trained neural network, providing a regressive value associated with the colour grade of the diamond.Type: ApplicationFiled: July 29, 2020Publication date: February 4, 2021Inventors: Koon Chung HUI, Ka Wing CHENG, Wing Chi TANG
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Publication number: 20210033540Abstract: A process is operable using a computerized system for grading the clarity of a diamond. The computerized system includes an optical image acquisition device, a processor, a pre-trained neural network and an output module operably interconnected together. The process includes: (i) acquiring via an optical image acquisition device one or more plural axial view images of a diamond with different focus depths; (ii) in a processor, combining the plural axial views to form one or more single optical images; (iii) in a pre-trained neural network, providing a regressive value associated with the clarity grade of the diamond based on the one or more single images acquired during step (i); and (iv) from an output module, providing a clarity grade to the diamond (i) by correlating the regression value from (ii) to a clarity grade.Type: ApplicationFiled: July 29, 2020Publication date: February 4, 2021Inventors: Koon Chung Hui, Ka Wing Cheng, Wing Chi Tang
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Publication number: 20200333257Abstract: A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).Type: ApplicationFiled: December 28, 2018Publication date: October 22, 2020Inventors: Ka Wing CHENG, Kin Wing WONG, Kong CHAN, Juan CHENG, Wing Chi TANG, Koon Chung HUI
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Patent number: 10762666Abstract: A computerized system for grading the colour of a diamond, wherein the colour of the diamond is graded based on a predetermined threshold of correlation of colour of a diamond with the colour of a diamond of a plurality of diamonds each having a colour grading assigned thereto, the computerized system including: an optical image acquisition device for acquiring at least a first optical image of a diamond, wherein the first optical image is acquired at a predetermined angle of inclination to the central axis extending normal to the table and through the apex of the pavilion of the diamond and in a direction of towards the table and wherein the first optical image is acquired in an environment having a predetermined constant light level; a processor module for comparing data derived from acquisition of the at least a first optical image with a plurality of data sets each of which corresponds to a diamond of a plurality of diamonds, wherein data sets are each derived from an optical image acquired by an opticalType: GrantFiled: December 31, 2018Date of Patent: September 1, 2020Assignee: Goldway Technology LimitedInventors: Ka Wing Cheng, Kin Wing Wong, Kong Chan, Juan Cheng, Wing Chi Tang, Koon Chung Hui
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Patent number: 10475355Abstract: An identifiable mark on a portion of a polished facet of a surface of an article and being identifiable by an optical magnifying viewing device, the identifiable mark comprising a nano-structure formed by a two-dimensional or a three-dimensional lattice of a plurality of discrete nanometer sized recessed or protruded entities, wherein the entities are arranged within a predefined region of the polished facet in a predetermined arrangement in relation to each other. The predetermined arrangement of the entities is non-uniform and non-periodic arrangement, and wherein the entities are sized and shaped so as to cause optical scattering upon reflection of incident light having one or more predetermined wavelengths by the lattice at a predetermined angle of incidence to the lattice and the distance from the inner interface surface to the outer interface surface is greater than the amplitude of the non-marked portion of the polished face.Type: GrantFiled: May 23, 2014Date of Patent: November 12, 2019Assignee: Chow Tai Fook Jewellery Company LimitedInventors: Koon Chung Hui, Wing Chi Tang, Ho Ching
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Publication number: 20190213757Abstract: A computerized system for grading the colour of a diamond, wherein the colour of the diamond is graded based on a predetermined threshold of correlation of colour of a diamond with the colour of a diamond of a plurality of diamonds each having a colour grading assigned thereto, the computerized system including: an optical image acquisition device for acquiring at least a first optical image of a diamond, wherein the first optical image is acquired at a predetermined angle of inclination to the central axis extending normal to the table and through the apex of the pavilion of the diamond and in a direction of towards the table and wherein the first optical image is acquired in an environment having a predetermined constant light level; a processor module for comparing data derived from acquisition of the at least a first optical image with a plurality of data sets each of which corresponds to a diamond of a plurality of diamonds, wherein data sets are each derived from an optical image acquired by an opticalType: ApplicationFiled: December 31, 2018Publication date: July 11, 2019Inventors: Ka Wing CHENG, Kin Wing WONG, Kong CHAN, Juan CHENG, Wing Chi TANG, Koon Chung HUI
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Publication number: 20150101365Abstract: An identifiable mark on a portion of a polished facet of a surface of an article and being identifiable by an optical magnifying viewing device, said identifiable mark comprising a nano-structure formed by a two-dimensional or a three-dimensional lattice of a plurality of discrete nanometer sized recessed or protruded entities, wherein said entities are arranged within a predefined region of said polished facet in a predetermined arrangement in relation to each other and such that an outer interface surface between the facet of the article and air is formed and an inner interface surface between the facet of the article and air is formed. Said predetermined arrangement of said entities is non-uniform and non-periodic arrangement, and wherein said entities are sized and shaped so as to cause optical scattering upon reflection of incident light and the distance from the inner interface surface to the outer interface surface is greater than the amplitude of the non-marked portion of said polished face.Type: ApplicationFiled: May 23, 2014Publication date: April 16, 2015Inventors: Koon Chung HUI, Wing Chi TANG, Ho CHING