Patents by Inventor Nazmul Hasan
Nazmul Hasan 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: 11762131Abstract: A variable focus optical device (100) can include first optically transparent membrane (102) and a second membrane (104) that at least partially define a chamber (106) retaining an optically transparent liquid. A transparent piston (110) is attached to the second membrane (104). At least one actuator (112a-c) is operatively coupled to the transparent piston (110) and configured to move to change a focal length of the variable focus optical device (100) via actuation of the transparent piston (110). Three curved bimorph actuators (112a-c) can surround and be coupled to the piston (110) for actuation of the piston (110) to generate a plano-convex or plano-concave lens via the membranes (102, 104). A smart eyeglasses system includes a pair of variable focus optical devices (100), an object distance sensor, a battery, optional eye-tracking camera(s), and a microcontroller, collectively used for purposes of sensing distance of objects and adjusting said focal length via the variable focus optical devices (100).Type: GrantFiled: September 29, 2020Date of Patent: September 19, 2023Assignee: UNIVERSITY OF UTAH RESEARCH FOUNDATIONInventors: Carlos Mastrangelo, Nazmul Hasan, Kim Hanseup
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Publication number: 20220102863Abstract: An electromagnetic wave manipulation apparatus may include a substrate integrated with a liquid crystal. For example, the substrate may include one or more cavities filled with the liquid crystal. Alternatively and/or additionally, the substrate may include one or more layers of material interposed with the liquid crystal. The liquid crystal may be subjected to a voltage bias that alters the dielectric constant of the liquid crystal. Doing so may introduce a corresponding field offset between the input signal and the output signal of the apparatus. Subjecting the liquid crystal to different voltage biases may give rise to a spatial phase gradient that enables the apparatus to perform a variety of electromagnetic wave transformations such as reflection, refraction, retro-reflection, amplification, and cancellation. By performing such transformations, the apparatus may change the radiation pattern of its output signal, thus steering its output signal towards or away from a receiver.Type: ApplicationFiled: September 29, 2021Publication date: March 31, 2022Inventors: Sudip Shekhar, Md Nazmul Hasan, Dinesh Bharadia
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Publication number: 20210011204Abstract: A variable focus optical device (100) can include first optically transparent membrane (102) and a second membrane (104) that at least partially define a chamber (106) retaining an optically transparent liquid. A transparent piston (110) is attached to the second membrane (104). At least one actuator (112a-c) is operatively coupled to the transparent piston (110) and configured to move to change a focal length of the variable focus optical device (100) via actuation of the transparent piston (110). Three curved bimorph actuators (112a-c) can surround and be coupled to the piston (110) for actuation of the piston (110) to generate a plano-convex or plano-concave lens via the membranes (102, 104). A smart eyeglasses system includes a pair of variable focus optical devices (100), an object distance sensor, a battery, optional eye-tracking camera(s), and a microcontroller, collectively used for purposes of sensing distance of objects and adjusting said focal length via the variable focus optical devices (100).Type: ApplicationFiled: September 29, 2020Publication date: January 14, 2021Inventors: Carlos Mastrangelo, Nazmul Hasan, Kim Hanseup
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Patent number: 10838116Abstract: A variable focus optical device (100) can include first optically transparent membrane (102) and a second membrane (104) that at least partially define a chamber (106) retaining an optically transparent liquid. A transparent piston (110) is attached to the second membrane (104). At least one actuator (112a-c) is operatively coupled to the transparent piston (110) and configured to move to change a focal length of the variable focus optical device (100) via actuation of the transparent piston (110). Three curved bimorph actuators (112a-c) can surround and be coupled to the piston (110) for actuation of the piston (110) to generate a plano-convex or plano-concave lens via the membranes (102, 104). A smart eyeglasses system includes a pair of variable focus optical devices (100), an object distance sensor, a battery, optional eye-tracking camera(s), and a microcontroller, collectively used for purposes of sensing distance of objects and adjusting said focal length via the variable focus optical devices (100).Type: GrantFiled: January 6, 2017Date of Patent: November 17, 2020Assignee: University of Utah Research FoundationInventors: Carlos Mastrangelo, Nazmul Hasan, Kim Hanseup
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Patent number: 10833503Abstract: A power tool including a power supply interface, a motor control circuit configured to regulate supply of power from the power supply interface to a motor, and an input unit actuatable by a user. A no-volt prevention circuit receives a first voltage signal from the power supply interface and a second voltage signal from the input unit. The no-volt protection circuit includes a main semiconductor switch arranged on a current path from the power supply interface to at least one component of the motor control circuit, and a resistor-capacitor circuit to turn the main semiconductor switch ON when the input unit is actuated after the power supply interface is coupled to the power supply, but not when the input unit is actuated before to the power supply interface is coupled to the power supply.Type: GrantFiled: August 9, 2018Date of Patent: November 10, 2020Assignee: Black & Decker Inc.Inventors: Arash Rahnamaee, Nazmul Hasan, Michael J. Kowalski, Vivekkumar Kumar
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Publication number: 20200224784Abstract: A tension driven actuator (100) comprises a support structure (102) formed of a peripheral bounded wall (118) at least partially defining a fluid chamber (112), and a first elastic diaphragm (116) attached, under tension, to the support structure (102) and enclosing the fluid chamber (112) with the support structure (102). A pressurized fluid (110) is disposed in the fluid chamber (112), and a tension modifier structure (108) is attached to the first elastic diaphragm (116), and is under tension with the first elastic diaphragm (1 16). In response to application of an electrical field to the tension modifier structure (108), the tension modifier structure (108) transitions from a diaphragm tension position to a diaphragm relaxed position, such that the tension modifier structure (108) deforms and contracts in size, thereby reducing tension of the first elastic diaphragm (116) such that fluid pressure causes deflection of a portion of the first elastic diaphragm (116).Type: ApplicationFiled: July 9, 2018Publication date: July 16, 2020Inventors: Nazmul Hasan, Fariha Khan, Shashank Pandey, Aishwaryadev Banerjee, Hanseup Kim, Carlos H. Mastrangelo
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Publication number: 20190052148Abstract: A power tool including a power supply interface, a motor control circuit configured to regulate supply of power from the power supply interface to a motor, and an input unit actuatable by a user. A no-volt prevention circuit receives a first voltage signal from the power supply interface and a second voltage signal from the input unit. The no-volt protection circuit includes a main semiconductor switch arranged on a current path from the power supply interface to at least one component of the motor control circuit, and a resistor-capacitor circuit to turn the main semiconductor switch ON when the input unit is actuated after the power supply interface is coupled to the power supply, but not when the input unit is actuated before to the power supply interface is coupled to the power supply.Type: ApplicationFiled: August 9, 2018Publication date: February 14, 2019Inventors: Arash Rahnamaee, Nazmul Hasan, Michael J. Kowalski, Vivekkumar Kumar
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Publication number: 20190011612Abstract: A variable focus optical device (100) can include first optically transparent membrane (102) and a second membrane (104) that at least partially define a chamber (106) retaining an optically transparent liquid. A transparent piston (110) is attached to the second membrane (104). At least one actuator (112a-c) is operatively coupled to the transparent piston (110) and configured to move to change a focal length of the variable focus optical device (100) via actuation of the transparent piston (110). Three curved bimorph actuators (112a-c) can surround and be coupled to the piston (110) for actuation of the piston (110) to generate a plano-convex or plano-concave lens via the membranes (102, 104). A smart eyeglasses system includes a pair of variable focus optical devices (100), an object distance sensor, a battery, optional eye-tracking camera(s), and a microcontroller, collectively used for purposes of sensing distance of objects and adjusting said focal length via the variable focus optical devices (100).Type: ApplicationFiled: January 6, 2017Publication date: January 10, 2019Inventors: Carlos Mastrangelo, Nazmul Hasan, Kim Hanseup
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Patent number: 10055470Abstract: A method and system to retrieve data dynamically from one or more datasets are disclosed. The method comprises receiving at least one query in a first query language. Thereafter, splitting the at least one query in the first query language into a plurality of sub-queries and transforming the plurality of sub-queries into one or more second query languages, wherein the one or more second query languages correspond to the one or more datasets. Other embodiments include a method that comprises processing the one or more transformed queries to retrieve one or more query results from the one or more datasets, and processing the one or more query results to generate a data presentation.Type: GrantFiled: April 26, 2015Date of Patent: August 21, 2018Assignee: IMS HEALTH INCORPORATEDInventors: Marcelo Manzo, Christopher Hahn, Nazmul Hasan