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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 |
| 4785678 | Swing drive mechanism A swinging apparatus such as a child's swinging play seat is driven by an extension spring linked between the suspension arm of the swing and a gear wheel which is coupled to a motor-driven drive shaft through meshed gears. In preferred arrangements, two ... | 11/22/1988 |
