Abstract: Embodiments of the subject invention are directed to a computer-implemented method and system for interacting with unidirectionally distributed content, including specifying an interaction manifest that corresponds to an item of unidirectional content, generating a corresponding interaction ID and an ID sound code, embedding the ID sound code in the audio portion of the corresponding item of unidirectional content, playing the item of unidirectional content which includes the embedded ID sound code, decoding, by a mobile device in proximity to a player the embedded ID sound code, requesting the corresponding interaction manifest and executing the interaction manifest.

Abstract: A filter assembly is provided for fitting to an aperture in the wall of an oil tank of a hydraulic system with a disposable filter canister positioned substantially within the tank. The canister comprises a shell having an end wall and a generally cylindrical side wall, an end plate attached to the shell, a tubular filter element fluid-tightly fitted between the end wall and the end plate to define an outer chamber and an inner chamber between which the only flow path is through the filter element. The end plate has a central aperture communicating with the inner chamber and surrounded by a ring of apertures communicating with the outer chamber. A filter head is fluid-tightly fitted to the outer face of the tank wall in register with the aperture.