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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 |
| 3946506 | Trimmer type road construction apparatus with pivotally connected conveyor An improved trimmer type road construction apparatus, particularly useful in applications requiring a high degree of maneuverability and control flexibility, which is steeringly controlled by turning a centrally disposed front track assembly in such a man... | 03/30/1976 |
| 3944814 | Light detecting apparatus of improved resolution There are provided a plurality of light receiving elements arranged at a predetermined spacing therebetween to be irradiated by a light beam, a plurality of logical product circuits, each being provided for a pair of adjacent light receiving elements and ... | 03/16/1976 |
