Abstract: A hard case coin display holder advantageously universal to coin size and shape, especially useful for ancient coins and Spanish pieces-of-eight which are always of irregular size and shape, while holding the coin attractively spatially centered, by at least two flexible transparent spring tension arms, within the protective confines of a quickly and easily assemblable and disassemblable see-through hard case. The present invention leaves much more of the irregularly shaped coin visible in the display than that achieved by opaque resilient rubberlike holed cores, which are the only present universal coin display interiors.

Abstract: An outlet protector auxiliary, for a vent duct which leads exhaust substance from equipment, such as lint and moisture from a clothes dryer, for venting discharge exteriorly of a building's wall, the vent duct outlet having a movable closure flap which has a substance-discharge position and a closed position. The auxiliary is in the form of a metal framework providing a cage-like body member, having enclosure panels having openings of a restricted size such as to permit discharge of exhaust through the openings but to block entry into the duct, from the wall's exterior, of matter of any size significantly larger than the particles of exhaust substance for which the auxiliary is provided; and the cage-like body member has a peripheral flange by which it is connected to the wall.