Abstract: A semiautomatic firearm is presented that is a combination of known parts from the AR-15 style firearms and AK-47 style firearms and new parts. The firearm includes a receiver and a removable trunnion inserted into the receiver. A barrel is threaded and pinned into the trunnion and an adjustable gas block is connected to the barrel. The gas block includes a gas bore and an adjustable member that extends into and out of the gas bore thereby adjusting the amount of gases that travel through the gas block. The firearm also includes a foregrip installed over the barrel and gas block. The foregrip has a pattern of venting openings therein and an opening that provides access to the adjustable member of the gas block as well as a top rail and a bottom rail. The combination of these components provides a semiautomatic firearm that operates smoothly while being rugged and durable.

Abstract: Gas permeable devices and methods are disclosed for cell culture, including cell culture devices and methods that contain medium at heights, and certain gas permeable surface area to medium volume ratios. These devices and methods allow improvements in cell culture efficiency and scale up efficiency.

Abstract: Gas permeable devices and methods are disclosed for cell culture, including cell culture devices and methods that contain medium at heights, and certain gas permeable surface area to medium volume ratios. These devices and methods allow improvements in cell culture efficiency and scale up efficiency.

Abstract: A semiautomatic firearm is presented that is a combination of known parts from the AR-15 style firearms and AK-47 style firearms and new parts. The firearm includes a receiver and a removable trunnion inserted into the receiver. A barrel is threaded and pinned into the trunnion and an adjustable gas block is connected to the barrel. The gas block includes a gas bore and an adjustable member that extends into and out of the gas bore thereby adjusting the amount of gases that travel through the gas block. The firearm also includes a foregrip installed over the barrel and gas block. The foregrip has a pattern of venting openings therein and an opening that provides access to the adjustable member of the gas block as well as a top rail and a bottom rail. The combination of these components provides a semiautomatic firearm that operates smoothly while being rugged and durable.

Abstract: Gas permeable devices and methods are disclosed for cell culture, including cell culture devices and methods that contain medium at heights, and certain gas permeable surface area to medium volume ratios. These devices and methods allow improvements in cell culture efficiency and scale up efficiency.

Abstract: Gas permeable devices and methods are disclosed for cell culture, including cell culture devices and methods that contain medium at heights, and certain gas permeable surface area to medium volume ratios. These devices and methods allow improvements in cell culture efficiency and scale up efficiency.

Abstract: The invention is an improved valve having a valve body, a valve stem having a valve plug portion and a valve stem portion, and a valve guide having an aperture in which the valve stem portion is received for reciprocal movement of the valve stem longitudinally inside the valve body. A valve seat is supported in the valve body and includes a pair of spaced apart circular valve seat surfaces that each sealingly engage a separate surface of the valve plug portion;. A spring biases the valve plug portion into sealing engagement with the valve seat. The valve seat has a pair of sealing surfaces that are brought in sealing engagement with distinct surface portions of the valve stem to provide improved and redundant sealing function. The valve has improved longevity and reliability.

Abstract: An audio-visual system having a media player, one or more output devices and a housing assembly resembling a beer keg is described. According to one or more embodiments, the media player includes an audio device or video device and the one or more output devices are speakers, displays or a combination thereof. In further embodiments, the media player is located on a moveable platform which moves in and out of the assembly. The assembly of some embodiments further includes one or more advertisements.

Abstract: An applicator for an external male urinary catheter is described for applying and securing a catheter to a user. The applicator has a solid cylinder preferably with slits surrounded by a flexible skirt on which the catheter is installed, and the cylinder causes the skirt to invert to apply the catheter to the user.

Abstract: Gas permeable devices and methods are disclosed for cell culture, including cell culture devices and methods that contain medium at heights, and certain gas permeable surface area to medium volume ratios. These devices and methods allow improvements in cell culture efficiency and scale up efficiency.

Abstract: Gas permeable devices and methods are disclosed for cell culture, including cell culture devices and methods that contain medium at heights, and certain gas permeable surface area to medium volume ratios. These devices and methods allow improvements in cell culture efficiency and scale up efficiency.