Patents by Inventor David W. Chang

David W. 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).

  • Patent number: 11918226
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: March 5, 2024
    Assignee: Silk Road Medical, Inc.
    Inventor: David W. Chang
  • Patent number: 11849954
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: December 26, 2023
    Assignee: Silk Road Medical, Inc.
    Inventor: David W. Chang
  • Patent number: 11604658
    Abstract: Many hybrid cloud topologies require virtual machines in a public cloud to use a router in a private cloud, even when the virtual machine is transmitting to another virtual machine in the public cloud. Routing data through an enterprise router on the private cloud via the internet is generally inefficient. This problem can be overcome by placing a router within the public cloud that mirrors much of the routing functionality of the enterprise router. A switch configured to intercept address resolution protocol (ARP) request for the enterprise router's address and fabricate a response using the MAC address of the router in the public cloud.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: March 14, 2023
    Assignee: Cisco Technology, Inc.
    Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
  • Publication number: 20210306299
    Abstract: Many hybrid cloud topologies require virtual machines in a public cloud to use a router in a private cloud, even when the virtual machine is transmitting to another virtual machine in the public cloud. Routing data through an enterprise router on the private cloud via the internet is generally inefficient. This problem can be overcome by placing a router within the public cloud that mirrors much of the routing functionality of the enterprise router. A switch configured to intercept address resolution protocol (ARP) request for the enterprise router's address and fabricate a response using the MAC address of the router in the public cloud.
    Type: Application
    Filed: June 11, 2021
    Publication date: September 30, 2021
    Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
  • Publication number: 20210251634
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Application
    Filed: May 5, 2021
    Publication date: August 19, 2021
    Inventor: David W. Chang
  • Publication number: 20210205571
    Abstract: Described herein are methods and devices for selectively applying fluids (particularly anesthetics) to a target tissue from within a blood vessel while minimizing the amount of fluid applied to non-target tissue. The injection catheters described herein may include an elongate body, a directional injector, and one or more holdfasts for securing the catheter before extending the injector. The methods of selectively applying anesthetic to a target structure generally include the steps of inserting an injection catheter into a body vessel, positioning the injection catheter within the body vessel near the target structure, anchoring the injection catheter before extending a directional injector from the injection catheter, and applying anesthetic from the injection catheter to the target structure.
    Type: Application
    Filed: October 19, 2020
    Publication date: July 8, 2021
    Inventor: David W. Chang
  • Patent number: 11057343
    Abstract: Many hybrid cloud topologies require virtual machines in a public cloud to use a router in a private cloud, even when the virtual machine is transmitting to another virtual machine in the public cloud. Routing data through an enterprise router on the private cloud via the internet is generally inefficient. This problem can be overcome by placing a router within the public cloud that mirrors much of the routing functionality of the enterprise router. A switch configured to intercept address resolution protocol (ARP) request for the enterprise router's address and fabricate a response using the MAC address of the router in the public cloud.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: July 6, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
  • Publication number: 20210173692
    Abstract: A hybrid cloud solution for securely extending a private cloud or network to a public cloud can be enhanced with tools for evaluating the resources offered by multiple public cloud providers. In an example embodiment, a public cloud evaluation system can be used to create a virtual machine (VM) in a public cloud to serve the function of a public cloud evaluation agent. The public cloud evaluation agent can instantiate one or more VMs and other resources in the public cloud, and configure the VMs and resources to execute performance evaluation software. The results of the performance evaluation software can be transmitted to a private enterprise network, and analyzed to determine whether the public cloud is an optimal public cloud for hosting an enterprise application.
    Type: Application
    Filed: November 25, 2020
    Publication date: June 10, 2021
    Inventors: David W. Chang, Rakesh M. Pathak
  • Patent number: 11005682
    Abstract: Network policies can be used to optimize the flow of network traffic between virtual machines (VMs) in a hybrid cloud environment. In an example embodiment, one or more policies can drive a virtual switch controller, a hybrid cloud manager, a hypervisor manager, a virtual switch, or other orchestrator to create one or more direct tunnels that can be utilized by a respective pair of VMs to bypass the virtual switch and enable direct communication between the VMs. The virtual switch can send the VMs network and security policies to ensure that these policies are enforced. The VMs can exchange security credentials in order to establish the direct tunnel. The direct tunnel can be used by the VMs to bypass the virtual switch and allow the VMs to communicate with each other directly.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: May 11, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: David W. Chang, Abhijit Patra, Nagaraj A. Bagepalli, Dileep Kumar Devireddy
  • Patent number: 10901769
    Abstract: A hybrid cloud solution for securely extending a private cloud or network to a public cloud can be enhanced with tools for evaluating the resources offered by multiple public cloud providers. In an example embodiment, a public cloud evaluation system can be used to create a virtual machine (VM) in a public cloud to serve the function of a public cloud evaluation agent. The public cloud evaluation agent can instantiate one or more VMs and other resources in the public cloud, and configure the VMs and resources to execute performance evaluation software. The results of the performance evaluation software can be transmitted to a private enterprise network, and analyzed to determine whether the public cloud is an optimal public cloud for hosting an enterprise application.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: January 26, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: David W. Chang, Rakesh M. Pathak
  • Publication number: 20200397446
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Application
    Filed: July 27, 2020
    Publication date: December 24, 2020
    Inventor: David W. Chang
  • Patent number: 10828460
    Abstract: Described herein are methods and devices for selectively applying fluids (particularly anesthetics) to a target tissue from within a blood vessel while minimizing the amount of fluid applied to non-target tissue. The injection catheters described herein may include an elongate body, a directional injector, and one or more holdfasts for securing the catheter before extending the injector. The methods of selectively applying anesthetic to a target structure generally include the steps of inserting an injection catheter into a body vessel, positioning the injection catheter within the body vessel near the target structure, anchoring the injection catheter before extending a directional injector from the injection catheter, and applying anesthetic from the injection catheter to the target structure.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: November 10, 2020
    Assignee: Silk Road Medical, Inc.
    Inventor: David W. Chang
  • Patent number: 10779835
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: September 22, 2020
    Assignee: Silk Road Medical, Inc.
    Inventor: David W. Chang
  • Patent number: 10722239
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: July 28, 2020
    Assignee: Silk Road Medical, Inc.
    Inventor: David W. Chang
  • Publication number: 20200177543
    Abstract: Many hybrid cloud topologies require virtual machines in a public cloud to use a router in a private cloud, even when the virtual machine is transmitting to another virtual machine in the public cloud. Routing data through an enterprise router on the private cloud via the internet is generally inefficient. This problem can be overcome by placing a router within the public cloud that mirrors much of the routing functionality of the enterprise router. A switch configured to intercept address resolution protocol (ARP) request for the enterprise router's address and fabricate a response using the MAC address of the router in the public cloud.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
  • Publication number: 20200108221
    Abstract: Described herein are methods and devices for selectively applying fluids (particularly anesthetics) to a target tissue from within a blood vessel while minimizing the amount of fluid applied to non-target tissue. The injection catheters described herein may include an elongate body, a directional injector, and one or more holdfasts for securing the catheter before extending the injector. The methods of selectively applying anesthetic to a target structure generally include the steps of inserting an injection catheter into a body vessel, positioning the injection catheter within the body vessel near the target structure, anchoring the injection catheter before extending a directional injector from the injection catheter, and applying anesthetic from the injection catheter to the target structure.
    Type: Application
    Filed: May 14, 2019
    Publication date: April 9, 2020
    Inventor: David W. Chang
  • Patent number: 10554620
    Abstract: Many hybrid cloud topologies require virtual machines in a public cloud to use a router in a private cloud, even when the virtual machine is transmitting to another virtual machine in the public cloud. Routing data through an enterprise router on the private cloud via the internet is generally inefficient. This problem can be overcome by placing a router within the public cloud that mirrors much of the routing functionality of the enterprise router. A switch configured to intercept address resolution protocol (ARP) request for the enterprise router's address and fabricate a response using the MAC address of the router in the public cloud.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: February 4, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
  • Publication number: 20200015826
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 16, 2020
    Inventor: David W. Chang
  • Patent number: 10462072
    Abstract: According to one aspect, a method includes an Intercloud Fabric Switch (ICS) included in a public cloud and an ICS cluster obtaining a packet, and determining if the packet is obtained from a site-to-site link that links the ICS to an enterprise datacenter. If the packet is obtained from the site-to-site link, it is determined whether the packet is an unknown unicast packet. If the packet is an unknown unicast packet, the packet is dropped, and if not, the packet is provided to an access link that links the ICS to a virtual machine. If the packet is not obtained from the site-to-site link, it is determined whether the packet is obtained from an inter-ICS link that allows the ICS to communicate with the ICS cluster. If the packet is obtained from the inter-ICS link, the packet is dropped if it is an unknown unicast packet.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: October 29, 2019
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: David W. Chang, Abhijit Patra, Nagaraj A. Bagepalli
  • Publication number: 20190254680
    Abstract: One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
    Type: Application
    Filed: January 24, 2019
    Publication date: August 22, 2019
    Inventor: David W. Chang