| 发明名称 |
TRANSPARENCY SLIDE UNIT AS WELL AS METHOD AND APPARATUS FOR PRODUCING THE SAME |
| 摘要 |
<p>A transparency slide unit for use in projectors and viewers comprising a film diapositive mounted and positively retained in a frame composed of two separate and substantially uniform frame halves permanently interlocked in mutually offset positions by rivetting, and an apparatus for mounting film transparencies in such frames.</p> |
| 申请公布号 |
CA1008280(A) |
申请公布日期 |
1977.04.12 |
| 申请号 |
CA19730178877 |
申请日期 |
1973.08.15 |
| 申请人 |
PETTERSSON, SVEN G. |
发明人 |
BERGGREN, ROLF U.;BLOM, ERIK G.B. |
| 分类号 |
G03D15/10 |
主分类号 |
G03D15/10 |
| 代理机构 |
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代理人 |
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