| 发明名称 |
Lighting system for illuminating billboards and the like |
| 摘要 |
A new and improved lighting system for illuminating signs such as billboards and the like which increases the amount of light illuminating the light from a light source by 15 to 20% as compared with previous systems and decreases the variance of illumination intensity by 50%.
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| 申请公布号 |
US4954935(A) |
申请公布日期 |
1990.09.04 |
| 申请号 |
US19890308166 |
申请日期 |
1989.02.08 |
| 申请人 |
HOLOPHANE COMPANY, INC. |
发明人 |
HAMMOND, DOUGLAS S.;ODLE, HERBERT A. |
| 分类号 |
F21S2/00;F21V13/04;G09F13/00;G09F13/02;G09F19/18 |
主分类号 |
F21S2/00 |
| 代理机构 |
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代理人 |
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