Abstract: The disclosed embodiments relate to implementation of a syntax for altering one or more rules by which a blockchain may be modified wherein the software implementing each client of a blockchain network are programmed to be responsive to requests or directives to alter one or more rules by which blocks may be added to a blockchain responsive to transactions received for storage therein, the requests/directives being processed by the client as a transaction and added to the block in accordance with the current state of the operating rules, thereby adding a new rule or modifying an existing rule for subsequent operation of the client.

Abstract: The disclosed systems and methods make derivatives contracts based on an underlying virtual currency available for trading. Certain derivatives contracts have a settlement value based on the transaction fees associated with recording and/or performing transactions for the selected virtual currency. The contracts can be used, for example, by virtual currency miners against certain risks associated with mining virtual currency.

Abstract: The disclosed embodiments relate generally to complex data stream control and entitlement. Specifically, the disclosed embodiments provide systems and methods for ensuring that only authenticated/verified participants receive data streams. A third party, e.g., a party other than the data provider or the data recipient, who is nevertheless associated with both the data provider and the data recipient, may be involved in controlling whether data streams from the data provider can reach the data recipient. Thus, a third party may logically sit between the data provider and the data recipient, and may decide whether the data recipient should receive data streams. The disclosed embodiments implement data generation, flow, control and permissioning between multiple entities via digital assets accessed and manipulated on a shared data structure.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Systems and methods are disclosed for settling futures contracts that are based on virtual currencies. A clearing counter-party operates a clearing counter-party computer that may oversee physical delivery of virtual currency between a buyer and seller. The clearing counter-party computer does not take possession of the virtual currency and monitors a publically viewable ledger to confirm that transactions have taken place.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: The disclosed systems and methods make derivatives contracts based on an underlying virtual currency available for trading. Certain derivatives contracts have a settlement value based on the difficulty factor associated with generating the selected virtual currency. Other disclosed derivatives contracts have a settlement value based on the expected yield that a virtual currency miner can expect to generate using a particular computer configuration. The contracts can be used, for example, by virtual currency miners to hedge certain risks associated with mining virtual currency.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: A method of filling an aneurysm is described which includes the step of advancing a device through a patient's vascular system to an aneurysm and positioning the device within the aneurysm. The device has a closed mesh structure forming by a plurality of flexible filaments. The device also has a proximal collar and a distal collar with the flexible filaments extending therebetween. The closed mesh structure is movable from a collapsed configuration to an expanded configuration.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.

Abstract: Devices and methods for removing an obstruction from a blood vessel are described. The devices are deployed in a collapsed condition and are then expanded within the body. The devices are then manipulated to engage and remove the obstruction.