Abstract: In a first aspect, the present invention provides methods for authenticating a nucleic acid molecule and its sequence with a molecular barcode and batch-stamp. In another aspect, the present invention provides methods for authenticating a nucleic acid amplification product. In a further aspect, the present invention provides compositions for encoding both single-stranded and double-stranded target nucleic acids with coded oligonucleotides. The compositions are useful in the practice of the methods of the invention.

Abstract: A promotional display communicating with a plurality of gaming machines. The promotional display optionally monitors the gaming machines to verify wins in a base game triggering the promotional display. Upon triggering, the promotional display optionally randomly selects an outcome that may supplement the award in a base game.

Abstract: Improved maintenance of skate bearings by means of a hand-tool adapted to rotate the ball bearings of an annular bearing assembly immersed in cleansing liquid to remove lubricant and contaminants. The tool is adapted to hold the outer annular race member of such a bearing assembly fixed and to hold the inner annular race member via its open center for rotation relative to the outer race member, thus rotating the ball bearings in the bearing assembly. Such rotational cleaning is conducive to extending the useful life of the bearings when subsequently re-oiled and re-installed in a skate wheel.

Abstract: Electrically actuated apparatus for sampling liquid from a body thereof provides visible countdown of the time interval between successive samplings and also provides visible countdown of the duration of the time in which individual samples are being taken. The samples are propelled by fluid from an external or internal source of pressure, whichever is greater, interconnected for each sample duration period to a sample intake chamber in the body of liquid being sampled.