Patents by Inventor Saeed Mohammadi

Saeed Mohammadi 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).

  • Patent number: 12089931
    Abstract: A wearable electronic device (e.g., an electronic watch) may detect and analyze one or more sensing signals corresponding to light detected by the device to determine whether the device is in a sensing state (e.g., the device is within a maximum sensing distance of a user). If the wearable electronic device is in the sensing state, the device may determine one or more physiological parameters from the same signals used to determine whether the device is in the sensing state.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: September 17, 2024
    Assignee: Apple Inc.
    Inventors: Xiyu Duan, Albert E. Cerussi, Paul D. Mannheimer, Saeed Mohammadi
  • Patent number: 12080506
    Abstract: A field emitter array (FEA) vacuum transistor is disclosed which includes a substrate and a plurality of nanorods formed of a first polarity dopant on the substrate.
    Type: Grant
    Filed: September 5, 2023
    Date of Patent: September 3, 2024
    Assignee: Purdue Research Foundation
    Inventors: Saeed Mohammadi, Shabnam Ghotbi
  • Publication number: 20240245329
    Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.
    Type: Application
    Filed: February 28, 2024
    Publication date: July 25, 2024
    Inventors: Saeed MOHAMMADI, Albert E. CERUSSI, Paul D. MANNHEIMER
  • Publication number: 20240186097
    Abstract: A field emitter array (FEA) vacuum transistor is disclosed which includes a substrate and a plurality of nanorods formed of a first polarity dopant on the substrate.
    Type: Application
    Filed: September 5, 2023
    Publication date: June 6, 2024
    Applicant: Purdue Research Foundation
    Inventors: Saeed MOHAMMADI, Shabnam GHOTBI
  • Patent number: 11931147
    Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: March 19, 2024
    Assignee: Apple Inc.
    Inventors: Saeed Mohammadi, Albert E. Cerussi, Paul D. Mannheimer
  • Publication number: 20230400450
    Abstract: A biological sensing system, comprising a microelectrode array having a plurality of islands that are thermally isolated from each other and are interconnected by flexible nano-scale wires. An embedded complementary metal oxide semiconductor (CMOS) instrumentation amplifier and wireless communication circuitry may be operatively connected to the microelectrode array and embedded within input/output pads connected to the wires at the periphery of the array.
    Type: Application
    Filed: April 14, 2023
    Publication date: December 14, 2023
    Applicant: Purdue Research Foundation
    Inventors: Hossein Pajouhi, Saeed Mohammadi, Mojgan Sarmadi
  • Patent number: 11749487
    Abstract: A field emitter array (FEA) vacuum transistor is disclosed which includes a substrate and a plurality of nanorods formed of a first polarity dopant on the substrate, wherein the dopant density is between about 1013 cm?3 to about 1015 cm?3.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: September 5, 2023
    Assignee: Purdue Research Foundation
    Inventors: Saeed Mohammadi, Shabnam Ghotbi
  • Publication number: 20230257802
    Abstract: This disclosure relates to catalytic nucleic acid probes, biosensors and lateral flow biosensor systems and methods and kits of using the probes, biosensors and lateral flow biosensor systems for detecting microorganisms such as Staphylococcus aureus.
    Type: Application
    Filed: November 18, 2022
    Publication date: August 17, 2023
    Inventors: Monsur Ali, Dawn White, Saeed Mohammadi, John D. Brennan, Yingfu Li, Alfredo Capretta
  • Patent number: 11552240
    Abstract: A sensor is disclosed which includes a piezoelectric layer, a piezoresistive layer, one or more electrode layers coupled to the piezoelectric layer and to the piezoresistive layer, the piezoelectric layer configured to provide an electrical signal in response to application of a dynamic disturbance, and the piezoresistive layer configured to provide a change in resistivity in response to application of a static disturbance.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: January 10, 2023
    Assignee: Purdue Research Foundation
    Inventors: Mukerrem Cakmak, Armen Yildirim, Rahim Rahimi, Saeed Mohammadi, Ali Shakouri
  • Publication number: 20220301805
    Abstract: A field emitter array (FEA) vacuum transistor is disclosed which includes a substrate and a plurality of nanorods formed of a first polarity dopant on the substrate, wherein the dopant density is between about 1013 cm?3 to about 1015 cm?3.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 22, 2022
    Applicant: Purdue Research Foundation
    Inventors: Saeed Mohammadi, Shabnam Ghotbi
  • Publication number: 20220273207
    Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.
    Type: Application
    Filed: May 13, 2022
    Publication date: September 1, 2022
    Inventors: Saeed MOHAMMADI, Albert E. CERUSSI, Paul D. MANNHEIMER
  • Patent number: 11331016
    Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: May 17, 2022
    Assignee: Apple Inc.
    Inventors: Saeed Mohammadi, Albert E. Cerussi, Paul D. Mannheimer
  • Patent number: 10728646
    Abstract: An earbud may have a housing with an ear portion and an elongated out-of-ear portion that protrudes away from the ear portion. A speaker may be aligned with a speaker port in the ear portion and may emit sound for a user. Audio playback functions and other operations may be controlled using a controller in the earbud. The controller may gather capacitive sensor data and other data and may use this data in identifying an operating mode of the earbud. Using information such as whether the earbud is in an in-ear state or an out-of-ear state or other sensor data, the controller may take actions such as pausing or resuming audio playback or adjusting playback volume. The capacitive sensor data can be gathered using capacitive sensing electrodes located on the ear portion and the stalk portion of the earbud.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: July 28, 2020
    Assignee: Apple Inc.
    Inventors: Saeed Mohammadi, Tao Shui
  • Publication number: 20200013946
    Abstract: A sensor is disclosed which includes a piezoelectric layer, a piezoresistive layer, one or more electrode layers coupled to the piezoelectric layer and to the piezoresistive layer, the piezoelectric layer configured to provide an electrical signal in response to application of a dynamic disturbance, and the piezoresistive layer configured to provide a change in resistivity in response to application of a static disturbance.
    Type: Application
    Filed: September 16, 2019
    Publication date: January 9, 2020
    Applicant: Purdue Research Foundation
    Inventors: Mukerrem Cakmak, Armen Yildirim, Rahim Rahimi, Saeed Mohammadi, Ali Shakouri
  • Publication number: 20190297408
    Abstract: An earbud may have a housing with an ear portion and an elongated out-of-ear portion that protrudes away from the ear portion. A speaker may be aligned with a speaker port in the ear portion and may emit sound for a user. Audio playback functions and other operations may be controlled using a controller in the earbud. The controller may gather capacitive sensor data and other data and may use this data in identifying an operating mode of the earbud. Using information such as whether the earbud is in an in-ear state or an out-of-ear state or other sensor data, the controller may take actions such as pausing or resuming audio playback or adjusting playback volume. The capacitive sensor data can be gathered using capacitive sensing electrodes located on the ear portion and the stalk portion of the earbud.
    Type: Application
    Filed: March 22, 2018
    Publication date: September 26, 2019
    Inventors: Saeed Mohammadi, Tao Shui
  • Publication number: 20180306770
    Abstract: A biological sensing system, comprising a microelectrode array having a plurality of islands that are thermally isolated from each other and are interconnected by flexible nano-scale wires. An embedded complementary metal oxide semiconductor (CMOS) instrumentation amplifier and wireless communication circuitry may be operatively connected to the microelectrode array and embedded within input/output pads connected to the wires at the periphery of the array.
    Type: Application
    Filed: November 16, 2017
    Publication date: October 25, 2018
    Inventors: Hossein Pajouhi, Saeed Mohammadi, Mojgan Sarmadi
  • Patent number: 9188563
    Abstract: A perforated metal oxide semiconductor (MOS) structure for single biomolecule, virus, or single cell detection is disclosed. The structure includes a nanochannel formed through a sensing region configured to allow a solution containing particles to pass through the perforated MOS sensor. First and second terminals are configured to measure electrical parameters representative of change of electrical characteristics of the solution as the particle passes through the perforated MOS structure.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: November 17, 2015
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Saeed Mohammadi, Mojgan Sarmadi, Hossein Pajouhi
  • Patent number: 9190269
    Abstract: Illustrative embodiments of power amplifiers and associated methods are disclosed. In at least one embodiment, a method may include fabricating a power amplifier in a first silicon layer of a silicon-on-insulator (SOI) substrate, wherein the SOI substrate comprises the first silicon layer, a second silicon layer, and a buried oxide layer disposed between the first and second silicon layers; removing at least some of the second silicon layer from the SOI substrate, after fabricating the power amplifier; and securing the SOI substrate, after removing at least some of the second silicon layer, to an electrically non-conductive and thermally conductive substrate.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: November 17, 2015
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Saeed Mohammadi, Sultan R. Helmi, Jing-Hwa Chen, Hossein Pajouhi
  • Publication number: 20150083597
    Abstract: A perforated metal oxide semiconductor (MOS) structure for single biomolecule, virus, or single cell detection is disclosed. The structure includes a nanochannel formed through a sensing region configured to allow a solution containing particles to pass through the perforated MOS sensor. First and second terminals are configured to measure electrical parameters representative of change of electrical characteristics of the solution as the particle passes through the perforated MOS structure.
    Type: Application
    Filed: September 26, 2014
    Publication date: March 26, 2015
    Applicant: Purdue Research Foundation
    Inventors: Saeed Mohammadi, Mojgan Sarmadi, Hossein Pajouhi
  • Patent number: 8907684
    Abstract: A method for forming a nanofluidic channel measuring system is disclosed. The method includes forming a first trench in a substrate, forming a second trench in the substrate, the first trench and the second trench are separated by a first width, providing a first conductor pad at a first location, providing a second conductor pad at a second location, forming a first nano-wire for coupling the first conductor pad with the second conductor pad, and forming a nano-channel through the first nano-wire, the nano-channel also coupling the first trench and the second trench, the nano-channel configured to sever the first nano-wire. A nanofluidic channel measuring system is also disclosed.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: December 9, 2014
    Assignee: Purdue Research Foundation
    Inventors: Teimour Maleki, Babak Ziaie, Saeed Mohammadi