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Hwa Yong
Hwa Yong Lee, Gyeonggi-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20090326108 | Halogen-Free Flame Retardant Thermoplastic Polyurethanes - Disclosed is a halogen-free flame retardant thermoplastic polyurethane composite resin composition. The disclosed flame retardant thermoplastic polyurethane composite resin composition is capable of improving flame retardancy and flaming-drip of a thermoplastic polyurethane resin through desirable formation of char during combustion, which uses a phosphinate, a diphosphinate and/or a polymer thereof, dipentaerythritol, talc, a melamine derivative, etc., instead of a halogen-based flame retardant, as a flame retardant. | 12-31-2009 |
| 20120021198 | Transparent Multilayer Sheet Having Electrostatic Dissipative Properties - Disclosed is a transparent multilayer sheet that is excellent in antistatic properties, as well as transparency. The transparent multilayer sheet includes a surface layer comprising a conductive thermoplastic polyurethane or polyurea resin containing ethylene oxide; and a back layer attached to the surface layer and comprising a transparent non-conductive polymer resin. Preferably, the polyurethane or polyurea resin is a polymerization product of (a) a polyether-based polymer containing ethylene oxide and reacting with an isocyanate group; (b) an aromatic or aliphatic diisocyanate compound; and (c) a chain extender C2 to C10 containing a primary hydroxyl group or an amine group, and the transparent non-conductive polymer resin is selected from the group consisting of polyethylene terephthalate, glycol modified polyethylene terephthalate, glycol modified polycyclohexaneterephthalate, polymethylmethacrylate, polycarbonate, transparent acrylonitrile-butadiene-styrene (ABS), and mixtures thereof. | 01-26-2012 |
Hwa Yong Seo, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20120018554 | SHREDDER AND METHOD OF SHREDDING PAPER - Provided is a paper shredder. The paper shredder includes a paper support part including a first paper support part having a first length, a second paper support part having a second length greater than the first length, and a paper feed slot between the first paper support part and the second paper support part, a first roller in which a portion thereof is exposed upward from the second paper support part through an opening defined in the second paper support part, a second roller in which a portion thereof is exposed upward from the first paper support part through an opening defined in the first paper support part, a cutter disposed below the paper feed slot to shred an introduced paper, and a motor operating the first roller, the second roller, and the cutter. The first paper support part and the second paper support part are reduced in height as being adjacent to the paper feed slot. | 01-26-2012 |
Hwa Yong Shin, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20100250557 | SYSTEM AND METHOD FOR EXTRACTING USERS OF SIMILAR INTERESTS BETWEEN VARIOUS TYPES OF WEB SERVERS - Disclosed herein is a system and method for extracting users of similar interests between various types of web servers. The system includes a user profile vector creation unit, a user similarity calculation unit, and a similar user extraction unit. The user profile vector creation unit collects tag data, performs standardization calculation on the degree of importance of each of one or more tags, and creates user profile vectors for respective users. The user similarity calculation unit calculates user similarity using the user profile vectors of the respective users created through the user profile vector creation unit. The similar user extraction unit extracts users of similar interests using the value of the user similarity calculated through the user similarity calculation unit. | 09-30-2010 |