Abstract: A ball lift sleeve and retrieval tool comprising a sleeve for disposing in tubing of a well, the sleeve defining a first passage from a first proximal end to a first distal end, and a retrieval tool for disposing in the tubing of the well, the retrieval tool being separately moveable in the tubing between mated and unmated conditions with respect to the sleeve, the retrieval tool at least partially mating with the first distal end of the sleeve when in the mated condition and at least partially closing fluid communication through the passage of the sleeve when mated therewith.

Abstract: A ball lift sleeve and retrieval tool comprising a sleeve for disposing in tubing of a well, the sleeve defining a first passage from a first proximal end to a first distal end, and a retrieval tool for disposing in the tubing of the well, the retrieval tool being separately moveable in the tubing between mated and unmated conditions with respect to the sleeve, the retrieval tool at least partially mating with the first distal end of the sleeve when in the mated condition and at least partially closing fluid communication through the passage of the sleeve when mated therewith.

Abstract: A point of sale device includes a point of sale functional component, such as, for example, a display, an input device, a printer, scales, a card reader, or other. An interface is connected to the component, through a standard port of the component. The interface includes a radio frequency communications function. The interface communicates information regarding the component over a wireless communication network. The wireless communication network connects to a maintenance gateway for the device, either via the network, other networks, or by other communicative connection. The device can be monitored and maintained by the maintenance gateway, and the maintenance gateway can be located at a remote location from the device. The interface can also include cooling elements and controls for the device and/or the interface.

Abstract: A telemetry system includes at least one telemetry communication device for handling security event information available to the telemetry communication device. The system also includes a central host device, and an “always on” network, such as the Internet, communicatively connected to the telemetry communication device and the central host device, for communications between the telemetry communication device and the central host device. Encryption key information is exchanged between the central host device and the telemetry communication device, via a secure path, such as a cellular telephone call between the devices wherein identity and authentication can be ensured by Calling Line Identity information, or other secure exchange. Telemetry information is communicated by the telemetry communication device and the central host device over the “always on” network, in encrypted format according to the particular encryption keys exchanged.

Abstract: A point of sale device includes a point of sale functional component, such as, for example, a display, an input device, a printer, scales, a card reader, or other. An interface is connected to the component, through a standard port of the component. The interface includes a radio frequency communications function. The interface communicates information regarding the component over a wireless communication network. The wireless communication network connects to a maintenance gateway for the device, either via the network, other networks, or by other communicative connection. The device can be monitored and maintained by the maintenance gateway, and the maintenance gateway can be located at a remote location from the device. The interface can also include cooling elements and controls for the device and/or the interface.