Abstract: An air filter having an inlet for air and an outlet for air comprises a body having a central channel, a first side with a first area, a second side having a second area, and a middle having a middle area, positioned between the first side and the second side. The middle area is less than the first area and less than the second area. A first fan is positioned in the body near the first side, and a second fan positioned in the body near the second side, and each fan blows air in the same direction. A filter cartridge is positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet.

Abstract: A multimode audio reproduction device is disclosed that comprises first and second audio reproduction modules coupled by a support structure. The first and second audio reproduction modules are movable between two configurations. In the first configuration the audio reproduction device serves as a loudspeaker while in the second configuration the audio reproduction device serves as a headphone.

Abstract: An air filter having an inlet for air and an outlet for air comprises a body having a central channel, a first side with a first area, a second side having a second area, and a middle having a middle area, positioned between the first side and the second side. The middle area is less than the first area and less than the second area. A first fan is positioned in the body near the first side, and a second fan positioned in the body near the second side, and each fan blows air in the same direction. A filter cartridge is positioned in the central channel at the middle, wherein during operation air flows from the inlet to the filter cartridge to the outlet.

Abstract: The present invention is a docking interface for portable electronic devices that feature at least a printed circuit board (PCB) contact and a set of spring loaded contact pins for facilitating the recharging of power source and transfer of data between the devices and their hosts. Because of the thickness of a PCB and the retraction of the spring loaded pins, the overall profile of the present invention is reduced to a minimum. At the same time, the reliability of the contact between the portable device and the docking station is assured. As such, the present invention offers an economical and reliable solution for docking interface in portable electronic devices that permit further reduction in size and weight without imposing constraints on the availability of increased functionality.