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).
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Patent number: 11918226Abstract: 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: GrantFiled: May 5, 2021Date of Patent: March 5, 2024Assignee: Silk Road Medical, Inc.Inventor: David W. Chang
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Patent number: 11849954Abstract: 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: GrantFiled: July 27, 2020Date of Patent: December 26, 2023Assignee: Silk Road Medical, Inc.Inventor: David W. Chang
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Patent number: 11604658Abstract: 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: GrantFiled: June 11, 2021Date of Patent: March 14, 2023Assignee: Cisco Technology, Inc.Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
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Publication number: 20210306299Abstract: 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: ApplicationFiled: June 11, 2021Publication date: September 30, 2021Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
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Publication number: 20210251634Abstract: 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: ApplicationFiled: May 5, 2021Publication date: August 19, 2021Inventor: David W. Chang
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Publication number: 20210205571Abstract: 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: ApplicationFiled: October 19, 2020Publication date: July 8, 2021Inventor: David W. Chang
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Patent number: 11057343Abstract: 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: GrantFiled: February 3, 2020Date of Patent: July 6, 2021Assignee: CISCO TECHNOLOGY, INC.Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
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Publication number: 20210173692Abstract: 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: ApplicationFiled: November 25, 2020Publication date: June 10, 2021Inventors: David W. Chang, Rakesh M. Pathak
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Patent number: 11005682Abstract: 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: GrantFiled: October 6, 2015Date of Patent: May 11, 2021Assignee: CISCO TECHNOLOGY, INC.Inventors: David W. Chang, Abhijit Patra, Nagaraj A. Bagepalli, Dileep Kumar Devireddy
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Patent number: 10901769Abstract: 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: GrantFiled: August 31, 2018Date of Patent: January 26, 2021Assignee: CISCO TECHNOLOGY, INC.Inventors: David W. Chang, Rakesh M. Pathak
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Publication number: 20200397446Abstract: 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: ApplicationFiled: July 27, 2020Publication date: December 24, 2020Inventor: David W. Chang
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Patent number: 10828460Abstract: 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: GrantFiled: May 14, 2019Date of Patent: November 10, 2020Assignee: Silk Road Medical, Inc.Inventor: David W. Chang
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Patent number: 10779835Abstract: 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: GrantFiled: January 24, 2019Date of Patent: September 22, 2020Assignee: Silk Road Medical, Inc.Inventor: David W. Chang
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Patent number: 10722239Abstract: 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: GrantFiled: September 24, 2019Date of Patent: July 28, 2020Assignee: Silk Road Medical, Inc.Inventor: David W. Chang
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Publication number: 20200177543Abstract: 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: ApplicationFiled: February 3, 2020Publication date: June 4, 2020Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
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Publication number: 20200108221Abstract: 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: ApplicationFiled: May 14, 2019Publication date: April 9, 2020Inventor: David W. Chang
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Patent number: 10554620Abstract: 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: GrantFiled: June 24, 2015Date of Patent: February 4, 2020Assignee: CISCO TECHNOLOGY, INC.Inventors: David W. Chang, Abhijit Patra, Nagaraj Bagepalli, Dileep Kumar Devireddy, Ganesh Sadasivan
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Publication number: 20200015826Abstract: 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: ApplicationFiled: September 24, 2019Publication date: January 16, 2020Inventor: David W. Chang
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Patent number: 10462072Abstract: 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: GrantFiled: March 15, 2018Date of Patent: October 29, 2019Assignee: CISCO TECHNOLOGY, INC.Inventors: David W. Chang, Abhijit Patra, Nagaraj A. Bagepalli
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Publication number: 20190254680Abstract: 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: ApplicationFiled: January 24, 2019Publication date: August 22, 2019Inventor: David W. Chang