Patents by Inventor Subir Das

Subir Das 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).

  • Publication number: 20250085128
    Abstract: Examples disclosed herein may involve a computing system configured to (i) after one or more sensor-equipped vehicles have traversed a real-world environment and captured sensor data that is representative of the real-world environment, perform an analysis of the sensor data; (ii) based on the analysis of the sensor data, derive a set of information about a traffic light within the real-world environment that includes one or more of (a) signal-face information that comprises an identification of each signal face of the traffic light or (b) traffic-rule information that comprises an indication of at least one traffic rule that is applicable to the traffic light; and (iii) encode the derived set of information about the traffic light into a map for the real-world environment.
    Type: Application
    Filed: November 25, 2024
    Publication date: March 13, 2025
    Inventors: Ritwik Subir Das, Kris Richard Efland, Nadha Nafeeza Gafoor, Nastaran Ghadar, Meng Tao
  • Patent number: 12158351
    Abstract: Examples disclosed herein may involve a computing system configured to (i) identify a stationary element in a real-world environment for which to infer information, (ii) detect a semantic relationship between the stationary element and one or more other stationary elements in the real-world environment, (iii) based on the detected semantic relationship, infer information about the stationary element, (iv) include the inferred information about the stationary element within a set of information that describes the stationary element.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: December 3, 2024
    Assignee: Lyft, Inc.
    Inventors: Ritwik Subir Das, Kris Richard Efland, Nadha Nafeeza Gafoor, Nastaran Ghadar, Meng Tao
  • Publication number: 20240355084
    Abstract: This disclosure describes a card-scan system that can update a card-scan machine learning model to improve card-character predictions for character-bearing cards by using an active-learning technique that learns from card-scan representations indicating corrections by users to predicted card characters. In particular, the disclosed systems can use a client device to capture and analyze a set of card images of a character-bearing card to predict card characters using a card-scan machine learning model. The disclosed systems can further receive card-scan gradients representing one or more corrections to incorrectly predicted card characters. Based on the card-scan gradients, the disclosed systems can generate active-learning metrics and retrain or update the card-scan machine learning model based on such active-learning metrics.
    Type: Application
    Filed: June 24, 2024
    Publication date: October 24, 2024
    Inventors: Ritwik Subir Das, Joan Devassy, Nadha Nafeeza Gafoor, Aahel Iyer, Swarn Avinash Kumar, Angela Lam, Kia Nishimine, Wiebke Poerschke, John Michael Sparks, Hristo Stefanov Stefanov, Wei You
  • Patent number: 12026926
    Abstract: This disclosure describes a card-scan system that can update a card-scan machine learning model to improve card-character predictions for payment cards, driver licenses, or other character-bearing cards by using an active-learning technique that learns from card-scan representations indicating corrections by users to predicted card characters. In particular, the disclosed systems can use a client device to capture and analyze a set of card images of a character-bearing card to predict card characters using a card-scan machine learning model. The disclosed systems can further receive card-scan gradients representing one or more corrections to incorrectly predicted card characters. Based on the card-scan gradients, the disclosed systems can generate active-learning metrics and retrain or update the card-scan machine learning model based on such active-learning metrics.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: July 2, 2024
    Assignee: Lyft, Inc.
    Inventors: Ritwik Subir Das, Joan Devassy, Nadha Nafeeza Gafoor, Aahel Iyer, Swarn Avinash Kumar, Angela Lam, Kia Nishimine, Wiebke Poerschke, John Michael Sparks, Hristo Stefanov Stefanov, Wei You
  • Patent number: 12018958
    Abstract: Examples disclosed herein may involve a computing system configured to (i) identify a stationary element in a real-world environment for which to infer information, (ii) detect a semantic relationship between the stationary element and one or more other stationary elements in the real-world environment, (iii) based on the detected semantic relationship, infer information about the stationary element, (iv) include the inferred information about the stationary element within a set of information that describes the stationary element.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 25, 2024
    Assignee: Lyft, Inc.
    Inventors: Ritwik Subir Das, Kris Richard Efland, Nadha Nafeeza Gafoor, Nastaran Ghadar, Meng Tao
  • Patent number: 11682124
    Abstract: Examples disclosed herein may involve a computing system that is operable to (i) identify a source map and a target map for transferring map data, where the source map and the target map have different respective coordinate frames and respective coverage areas that at least partially overlap, (ii) select a real-world element for which to transfer previously-created map data from the source map to the target map, (iii) select a source image associated with the source map in which the selected real-world element appears and has been labeled, (iv) select a target image associated with the target map in which the selected real-world element appears, (v) derive a geometric relationship between the source image and the target image, and (vi) use the derived geometric relationship between the source image and the target image to determine a position of the real-world element within the respective coordinate frame of the target map.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: June 20, 2023
    Assignee: Lytt, inc.
    Inventors: Ritwik Subir Das, Kris Richard Efland, Nadha Nafeeza Gafoor, Nastaran Ghadar, Meng Tao
  • Publication number: 20220207433
    Abstract: An artificial intelligence (AI) prediction engine is used to correctly classify an entity based on a predetermined classification taxonomy, e.g., NAICS. The engine and process for using takes as inputs an entity's social presence (e.g., name, web address, etc.) and address. The AI prediction engine employs various machine learning models to make a classification prediction.
    Type: Application
    Filed: November 22, 2021
    Publication date: June 30, 2022
    Applicant: Cognizant Technology Solutions U.S. Corporation
    Inventors: Subir Das, Michael Oczkowski, Kavitha Lokesh, Sankar Pariserumperumal
  • Publication number: 20220108121
    Abstract: This disclosure describes a card-scan system that can update a card-scan machine learning model to improve card-character predictions for payment cards, driver licenses, or other character-bearing cards by using an active-learning technique that learns from card-scan representations indicating corrections by users to predicted card characters. In particular, the disclosed systems can use a client device to capture and analyze a set of card images of a character-bearing card to predict card characters using a card-scan machine learning model. The disclosed systems can further receive card-scan gradients representing one or more corrections to incorrectly predicted card characters. Based on the card-scan gradients, the disclosed systems can generate active-learning metrics and retrain or update the card-scan machine learning model based on such active-learning metrics.
    Type: Application
    Filed: October 5, 2020
    Publication date: April 7, 2022
    Inventors: Ritwik Subir Das, Joan Devassy, Nadha Nafeeza Gafoor, Aahel Iyer, Swarn Avinash Kumar, Angela Lam, Kia Nishimine, Wiebke Poerschke, John Michael Sparks, Hristo Stefanov Stefanov, Wei You
  • Publication number: 20210407114
    Abstract: Examples disclosed herein may involve a computing system that is operable to (i) identify a source map and a target map for transferring map data, where the source map and the target map have different respective coordinate frames and respective coverage areas that at least partially overlap, (ii) select a real-world element for which to transfer previously-created map data from the source map to the target map, (iii) select a source image associated with the source map in which the selected real-world element appears and has been labeled, (iv) select a target image associated with the target map in which the selected real-world element appears, (v) derive a geometric relationship between the source image and the target image, and (vi) use the derived geometric relationship between the source image and the target image to determine a position of the real-world element within the respective coordinate frame of the target map.
    Type: Application
    Filed: June 29, 2020
    Publication date: December 30, 2021
    Inventors: Ritwik Subir Das, Kris Richard Efland, Nadha Nafeeza Gafoor, Nastaran Ghadar, Meng Tao
  • Publication number: 20210404841
    Abstract: Examples disclosed herein may involve a computing system configured to (i) identify a stationary element in a real-world environment for which to infer information, (ii) detect a semantic relationship between the stationary element and one or more other stationary elements in the real-world environment, (iii) based on the detected semantic relationship, infer information about the stationary element, (iv) include the inferred information about the stationary element within a set of information that describes the stationary element.
    Type: Application
    Filed: June 30, 2020
    Publication date: December 30, 2021
    Inventors: Ritwik Subir Das, Kris Richard Efland, Nadha Nafeeza Gafoor, Nastaran Ghadar, Meng Tao
  • Patent number: 9526040
    Abstract: A method of employing an encoding scheme for media independent handover, comprising: having at least some data type carry only required information to determine the end of data without a length value.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: December 20, 2016
    Assignees: TOSHIBA AMERICA RESEARCH, INC., TELCORDIA TECHNOLOGIES, INC.
    Inventors: Yoshihiro Oba, Subir Das, Yuu-Heng Alice Cheng, Miriam Tauil, Kenichi Taniuchi
  • Patent number: 9094412
    Abstract: A self-organizing IP multimedia subsystem exhibiting node splitting and node merging functions wherein any node within the self organizing IP multimedia subsystem may assume any role thereby providing node balancing and fault tolerance to an overall network.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: July 28, 2015
    Assignee: Telecordia Technologies, Inc.
    Inventors: Ashutosh Dutta, Dana Chee, Christian Makaya, Subir Das, Fuchun Joseph Lin, Ming Lai, Tsunehiko Chiba, Satoshi Komorita, Hidetoshi Yokota
  • Patent number: 9025771
    Abstract: A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. Methods for mitigating delay during SA re-association and mitigating the IPSec tunnel overhead for signaling and media at the Mobile Node are given. In one embodiment, SA keys can be transferred from the old P-CSCF to new P-CSCF, enabling the establishment of SAs before Mobile Node physically moves to the new subnet in a network. Proactive handover is used. In another embodiment, SA keys are transferred from S-CSCF to new P-CSCF. In this case, the SA keys are transferred to the new P-CSCF by S-CSCF through a context transfer mechanism well in advance so that SAs may be established before Mobile Node physically moves to new subnet. In another embodiment, methods for mitigating IPSec tunnel overhead are presented.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: May 5, 2015
    Assignee: Telcordia Technologies, Inc.
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, Subir Das, Fuchun Joesph Lin, Kyriakos Manousakis, Dana Chee, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Patent number: 8971239
    Abstract: A mobile device includes: multiple interfaces that are configured to support a various access technology such as 3G or Wi-Fi etc. A public land mobile network (PLMN) selector that generates a list for each of the PLMN networks that provide coverage to the mobile device. A PLMN selection policy parameter that is set to True or False to allow or prohibit the selection of PLMN networks by the mobile device based on the generated list where the generated list includes information as to different access technologies and selection priorities supported on the PLMN access networks providing coverage to the mobile device. In particular, when the PLMN selection policy parameter is set to True, multiple PLMN registrations are allowed; and when the A PLMN selection policy parameter is set to False, multiple PLMN registrations are prohibited.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: March 3, 2015
    Assignees: Kabushiki Kaisha Toshiba, Telcordia Technologies Inc.
    Inventors: Yoshihiro Oba, Raquel Morera, Subir Das
  • Patent number: 8971291
    Abstract: A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. One proactive method includes proactive authentication. Another proactive method includes proactive security association, such as transferring SA keys from old proxy to new proxy, or transferring keys through serving signal entities. Reactive methods include transferring SA keys from old proxy to new proxy, using either push or pull technology. Other reactive methods include transferring keys through serving signal entities using either push or pull technology.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: March 3, 2015
    Assignees: Telcordia Technologies, Inc., KDDI Corporation
    Inventors: Ashutosh Dutta, Abhrajit Ghosh, Subir Das, Dana Chee, Kyriakos Manousakis, Funchun Joseph Lin, Shih-wei Li, Tsunehiko Chiba, Hidetoshi Yokota, Akira Idoue
  • Patent number: 8929330
    Abstract: In some of the preferred embodiments, a method for network discovery of a mobile device to use at least one of a plurality of access networks within an IP network includes: obtaining specified network information in the vicinity of a given location based on a set of criteria when a mobile is connected to the IP network from any location.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: January 6, 2015
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Kenichi Taniuchi, Yoshihiro Ohba, Sunil Madhani, Subir Das, Ashutosh Dutta
  • Patent number: 8886935
    Abstract: According to some embodiments, a key management apparatus for deploying in a smart grid system adapted to receive metering data from smart meters connected to at least one relay via a network, includes: a key control mechanism that derives a key array of individual purpose specific keys from one master key such that the purpose specific key in the key array are each independent cryptographic keys for each specific usage in an application or for each application if there is only one specific usage in an application.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: November 11, 2014
    Assignees: Kabushiki Kaisha Toshiba, Telcordia Technologies Inc.
    Inventors: Yoshihiro Ohba, Mitsuru Kanda, Subir Das, David Famolari
  • Patent number: 8781473
    Abstract: A solution framework is employed that includes defining of a mechanism to run multiple queries in a single message exchange, along with a priority on a per-query basis. In some embodiments, a system for facilitating handover of a mobile device across heterogeneous access networks by ensuring response to queries transmitted by the mobile device includes: a) a mobile device having a plurality of wireless network interfaces for communicating over a plurality of heterogeneous access networks, having a media independent handover (MIH) entity to facilitate handovers between the heterogeneous networks, and configured to transmit queries related to handover operation between the heterogeneous access networks to MIH entities within said heterogeneous access networks; and b) said media independent handover entity of said mobile device being configured to transmit multiple queries in a single message exchange to an MIH entity in an access network with prioritization among said multiple queries.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: July 15, 2014
    Assignees: Toshiba America Research, Inc., Telecordia Technologies, Inc.
    Inventors: Yoshihiro Oba, Yuu-Heng Alice Cheng, Subir Das, Kenichi Taniuchi
  • Patent number: 8717931
    Abstract: In some of the preferred embodiments, a method for network discovery of a mobile device to use at least one of a plurality of access networks within an IP network includes: obtaining specified network information in the vicinity of a given location based on a set of criteria when a mobile is connected to the IP network from any location.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: May 6, 2014
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Kenichi Taniuchi, Yoshihiro Ohba, Sunil Madhani, Subir Das, Ashutosh Dutta
  • Patent number: 8707416
    Abstract: The preferred embodiments involve a mechanism to bootstrap Kerberos from EAP in which EAP is used for initial network access authentication and Kerberos is used for provisioning session keys to multiple different protocols. The preferred embodiments make use of an EAP extension method (EAP-EXT) to realize the mechanism.
    Type: Grant
    Filed: November 24, 2007
    Date of Patent: April 22, 2014
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc
    Inventors: Yoshihiro Oba, Subir Das