发明名称 |
VORRICHTUNG FUR DAS AUF- UND ABROLLEN EINER PROJEKTIONSLEINWAND |
摘要 |
<p>1467569 Projection screens NECKERMANN VERSAND KGaA 18 Aug 1975 [17 Jan 1975] 34267/75 Heading G2X [Also in Division H4] At least one loud speaker is mounted inside a box housing a projection screen rolled on a spool. The screen is unwound from the box and the loud speaker permits a commentary or music to accompany the projected pictures. Preferably two speakers are provided, one at each end of the spool, for stereophonic effects.</p> |
申请公布号 |
AT335537(B) |
申请公布日期 |
1977.03.10 |
申请号 |
AT19750005799 |
申请日期 |
1975.07.25 |
申请人 |
NECKERMANN VERSAND KG A A |
发明人 |
|
分类号 |
G03B21/58;(IPC1-7):04R1/02;03B21/56 |
主分类号 |
G03B21/58 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|