| 发明名称 |
OVERHEAD PROJECTOR PRESENTATION SYSTEM |
| 摘要 |
A module for an overhead projector comprising a housing having one or more movable masks controlled by a manual or automatic control and having a highlight bar and a pointer.
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| 申请公布号 |
CA2116191(A1) |
申请公布日期 |
1995.08.23 |
| 申请号 |
CA19942116191 |
申请日期 |
1994.02.22 |
| 申请人 |
BLAKE, GEORGE B. |
发明人 |
BLAKE, GEORGE B. |
| 分类号 |
G03B21/132;(IPC1-7):G03B21/132 |
主分类号 |
G03B21/132 |
| 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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