Invention Grant
US3670193A Electric lamps producing energy in the visible and ultra-violet ranges 失效
在可见和超紫外线范围内生产能量的电动灯

Electric lamps producing energy in the visible and ultra-violet ranges
Abstract:
Electric lamps having spectral radiation characteristics approximating natural daylight with a controlled amount of energy in the near and middle ultraviolet ranges which also produce light of sufficient intensity and proper color to make them usable as general illuminants.
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