Patents by Inventor Grant Chang
Grant Chang 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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Publication number: 20250066841Abstract: Provided are methods of detecting analytes. In some configurations, the methods can employ analytes attached to a solid support or particle and affinity reagents that are attached to the solid support or particle via a flexible linker. In some configurations, the methods can employ analytes attached to a solid support or particle and solution-phase affinity reagents can be attracted to the analytes via application of a stimulus.Type: ApplicationFiled: August 23, 2024Publication date: February 27, 2025Inventors: Robert GROTHE, Kara JUNEAU, Michael Augusto DARCY, Parag MALLICK, Jacinto VILLANUEVA, Vivekananda BUDAMAGUNTA, Jonathan LEANO, Pengyu HAO, Terren CHANG, Aimee SANFORD, Maureen NEWMAN, Filip BARTNICKI, Rukshan PERERA, Grant NAPIER
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Patent number: 12208635Abstract: Systems and methods related to adaptive ribbon speed control for a line matrix impact printer are provided. A ribbon cartridge includes a ribbon configured to be driven at a ribbon speed, and a ribbon gear configured to rotate with movement of the ribbon. The ribbon includes a ribbon joint patch detectable via a first sensor to determine a first ribbon speed of the ribbon. Rotation of the ribbon gear is detectable via a second sensor to determine a second ribbon speed of the ribbon. A target ribbon speed is determined based on at least one print job characteristic. A current ribbon speed is determined based on the first ribbon speed and the second ribbon speed. The ribbon speed is adjusted based on a difference between the current ribbon speed and the target ribbon speed. Associated systems and methods are also provided.Type: GrantFiled: February 27, 2023Date of Patent: January 28, 2025Assignee: PRINTRONIX, LLCInventors: Yu-Min Grant Chang, Robert Ovcharenko, Lee Fang Chong, Ming Ming Yin
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Publication number: 20240286423Abstract: Systems and methods related to adaptive ribbon speed control for a line matrix impact printer are provided. A ribbon cartridge includes a ribbon configured to be driven at a ribbon speed, and a ribbon gear configured to rotate with movement of the ribbon. The ribbon includes a ribbon joint patch detectable via a first sensor to determine a first ribbon speed of the ribbon. Rotation of the ribbon gear is detectable via a second sensor to determine a second ribbon speed of the ribbon. A target ribbon speed is determined based on at least one print job characteristic. A current ribbon speed is determined based on the first ribbon speed and the second ribbon speed. The ribbon speed is adjusted based on a difference between the current ribbon speed and the target ribbon speed. Associated systems and methods are also provided.Type: ApplicationFiled: February 27, 2023Publication date: August 29, 2024Inventors: Yu-Min Grant Chang, Robert Ovcharenko, Lee Fang Chong, Ming Ming Yin
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Publication number: 20220318914Abstract: A method for performing attribution analysis with respect to an investment portfolio is provided. The method includes: identifying a set of attributes, such as asset class, time period, risk profile, liquidity profile, and/or geographic region, of the investment portfolio; generating a graph that indicates respective relationships among attribute-related decision points that impact the investment portfolio; and calculating, based on the respective relationships among decision points, a respective attribution result for each individual attribute, in order to obtain a set of attribution results that is associated with the investment portfolio. The calculations of the attribution results are independently performable and may be performed in parallel.Type: ApplicationFiled: March 29, 2022Publication date: October 6, 2022Applicant: JPMorgan Chase Bank, N.A.Inventors: Xiaotao WU, Shuo CHEN, Grant CHANG, Xueqing HU, Rafael FORTE, Ricardo ARNT, Dmitriy FRENKEL
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Publication number: 20060260207Abstract: A door assembly for a cabinet includes an adapter member and at least one door. Each the door is pivotably connected to the adapter member by at least two hinges. When install the door assembly to a cabinet, the door is mounted to the cabinet. Thus, it is convenient for customers assembling cabinets with at least one door. No adjustments of adjusting the door and the hinge are required.Type: ApplicationFiled: April 27, 2005Publication date: November 23, 2006Inventor: Grant Chang
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Patent number: 6896429Abstract: An ink density closed loop control system for an ink ribbon of an impact printer having a reservoir roller formed of an ink absorbent material with at least one or more channels within the reservoir roller fluidly connected to a pump and ink supply. A transfer roller can contact the reservoir roller for imparting ink to the ink ribbon. A sensor senses the relative amount of ink on the print ribbon and an electrical drive responsive to the sensor drives the pump for a flow of ink to the one or more channels. The sensor can sense ink on different segments of the ribbon and, with two or more channels in the reservoir roller can distribute ink to two or more segments of the reservoir roller depending upon the ink sensed at a particular segment of the ribbon. A further enhancement of this invention provides a multi-viscosity ink to compensate for changes in ambient temperature conditions.Type: GrantFiled: December 18, 2003Date of Patent: May 24, 2005Assignee: Printronix, Inc.Inventors: Dennis R. White, Jeng-Dung Jou, Gordon B. Barrus, Y. Grant Chang, John W. Gemmell, John S. Kinley, Lihu Chiu, Kevin P. Moore
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Publication number: 20040179881Abstract: An ink density closed loop control system for an ink ribbon of an impact printer having a reservoir roller formed of an ink absorbent material with at least one or more channels within the reservoir roller fluidly connected to a pump and ink supply. A transfer roller can contact the reservoir roller for imparting ink to the ink ribbon. A sensor senses the relative amount of ink on the print ribbon and an electrical drive responsive to the sensor drives the pump for a flow of ink to the one or more channels. The sensor can sense ink on different segments of the ribbon and, with two or more channels in the reservoir roller can distribute ink to two or more segments of the reservoir roller depending upon the ink sensed at a particular segment of the ribbon. A further enhancement of this invention provides a multi-viscosity ink to compensate for changes in ambient temperature conditions.Type: ApplicationFiled: December 18, 2003Publication date: September 16, 2004Inventors: Dennis R. White, Jeng-Dung Jou, Gordon B. Barrus, Y. Grant Chang, John W. Gemmell, John S. Kinley, Lihu Chiu, Kevin P. Moore
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Patent number: 6695495Abstract: An ink density closed loop control system for an ink ribbon of an impact printer having a reservoir roller formed of an ink absorbent material with at least one or more channels within the reservoir roller fluidly connected to a pump and ink supply. A transfer roller can contact the reservoir roller for imparting ink to the ink ribbon. A sensor senses the relative amount of ink on the print ribbon and an electrical drive responsive to the sensor drives the pump for a flow of ink to the one or more channels. The sensor can sense ink on different segments of the ribbon and, with two or more channels in the reservoir roller can distribute ink to two or more segments of the reservoir roller depending upon the ink sensed at a particular segment of the ribbon. A further enhancement of this invention provides a multi-viscosity ink to compensate for changes in ambient temperature conditions.Type: GrantFiled: March 12, 2003Date of Patent: February 24, 2004Assignee: Printronix, Inc.Inventors: Dennis R. White, Jeng-Dung Jou, Lihu Chiu, Gordon B. Barrus, Y. Grant Chang
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Patent number: 6478487Abstract: An impact printer such as a line printer having a base with a hammerbank mounted on the base driven for reciprocal movement. The hammerbank has a plurality of hammers with printing tips formed on frets in two longitudinally oriented rows defining an upper row and a lower row. A permanent magnet with pole pieces retains the hammers until a coil overcomes the magnetic retention. A print ribbon is impacted by the printing tips of the impact printer such as a line printer against a print media. The print ribbon has a first longitudinal high strike zone of ink of greater print yield with a low strike zone of lesser print yield on either side of the first zone. The print yield can be a factor of ink viscosity, pigment content, fabric content, fabric composition, or dye features.Type: GrantFiled: June 22, 2001Date of Patent: November 12, 2002Assignee: Printronix, Inc.Inventors: Jeng-Dung Jou, Y. Grant Chang
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Patent number: 6423155Abstract: A new high strength steel alloy characterized by having high DC magnetic saturation, ultra high tensile, yield and fatigue strengths that is particularly suited for use as a hammerspring in hammerbanks in impact printers and for other applications where magnetic alloys are used and high mechanical strength is desirable. The alloy is formed of the following composition in weight percent: about 20% to about 35% Co; about 2% to about 6.0% Ni; about 0.0 to about 0.15% C; about 0.75% to about 3% Mo; 0% to about 3.0% Cr; 0% to about 2% Mu; 0% to about 0.02% Si; 0% to about 0.003% P; 0% to about 0.001% S; 0% to about 0.005% 02+N2;with the balance comprised of Fe. A process for making the alloy includes homogenizing preferably at a temperature of 2150° F. for 24 hours, and solution treating at a temperature in the range of about 1500° F. to about 1700° F. under a vacuum or inert gas protective atmosphere; air-cooling; and precipitation aging at a temperature in the range of about 800° F.Type: GrantFiled: August 29, 2000Date of Patent: July 23, 2002Assignee: Printronix, Inc.Inventors: Y. Grant Chang, Norman E. Farb
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Patent number: 6244768Abstract: A line printer with a hammerbank having print hammers with printing tips and a ribbon supported for impact by the tips for printing on media and a metal platen for supporting the media. An elastomer on the metal platen supports the media and has a layer of material harder than the elastomer extending inwardly from its surface which receives the impacts of the hammer tips. The harder material can be particles extending inwardly randomly from the surface of the elastomer of a ceramic having a sphericity exceeding 0.50 up to 35 percent of the thickness of the elastomer, and in the range of 20 microns to 400 microns in size.Type: GrantFiled: March 2, 1999Date of Patent: June 12, 2001Assignee: Printronix, Inc.Inventors: Y. Grant Chang, Norman E. Farb
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Patent number: 6146033Abstract: A new high strength steel alloy characterized by having high DC magnetic saturation, ultra high tensile, yield and fatigue strengths that is particularly suited for use as a hammerspring in hammerbanks in impact printers and for other applications where magnetic alloys are used and high mechanical strength is desirable. The alloy is formed of the following composition in weight percent: about 20% to about 35% Co; about 2% to about 6.0% Ni; about 0.0 to about 0.15% C; about 0.75% to about 3% Mo; 0% to about 3.0% Cr; 0% to about 2% Mn; 0% to about 0.02% Si; 0% to about 0.003% P; 0% to about 0.001% S; 0% to about 0.005% O.sub.2 +N.sub.2 ; with the balance comprised of Fe.A process for making the alloy includes homogenizing preferably at a temperature of 2150.degree. F. for 24 hours, and solution treating at a temperature in the range of about 1500.degree. F. to about 1700.degree. F. under a vacuum or inert gas protective atmosphere; air-cooling; and precipitation aging at a temperature in the range of about 800.Type: GrantFiled: June 3, 1998Date of Patent: November 14, 2000Assignee: Printronix, Inc.Inventors: Y. Grant Chang, Norman E. Farb