| 1987-06-30 Original document Abstract of US4676226 | ||
| A light rays bathtub has an inner surface formed as a reflection surface and an optical conductor for radiating visible light rays into the tub. The bathtub is so constructed that the visible light rays are radiated over the entire area in the tub. An entire body can bath effectively in the light rays consisting of only the visible light ray component not containing therein harmful ultraviolet, infrared or the like. | ||
3/19/08
Light rays bathtub
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