| 发明名称 |
ECRANS PLANS, CONCAVES, CONVEXES ET/OU CIRCULAIRES A SURFACE ONDEE POURTOUTES PROJECTIONS, NOTAMMENT CINEMA, TELEVISION, DIAPOSITIVES OU PROJECTIONS ASSIMILEES. |
| 摘要 |
<p>Screen surface is corrugated, with crests extending vertically. Pref. the screen has a concave profile in horizontal section. The ratio between the height and length of the crests in 1/7-1/20. The screen is used for film, slide, or television projection.</p> |
| 申请公布号 |
BE766874(A1) |
申请公布日期 |
1971.11.08 |
| 申请号 |
BE19710766874 |
申请日期 |
1971.05.07 |
| 申请人 |
JANSSEN JACOBUS EMILIUS, HEIHOEVESTRAAT 37 B, EISDEN, |
发明人 |
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| 分类号 |
G03B21/602;(IPC1-7):03B/ |
主分类号 |
G03B21/602 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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