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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 |
| 6152066 | Display instrument A display instrument with a first display and with an electro-luminescent display arranged at least partially in front of the first display is, where the first display can be illuminated or can be rendered luminous and appears as an almost uniformly dark ... | 11/28/2000 |
