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A method for inducing cats to exercise consists of directing a beam of invisible light produced by a hand-held laser apparatus onto the floor or wall.
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| Number | Title | Issue Date |
| 4549837 | Penstock An improved penstock for water-flow control provides the capability of establishing a constant water level within a levee or a dike and is continuously adjustable between a high and a low water level. The penstock has an erosion-resistant flow channel whi... | 10/29/1985 |
| 4224156 | Weir skimmer An apparatus for controlling the liquid level of overflow ponds and the like. It comprises a vertical standpipe having a polymer feed inlet near its bottom, a valve for controlling flow of polymer to the polymer feed inlet, at least 1 fluid discharge inle... | 09/23/1980 |
