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发明名称
IMPROVEMENTS IN OR RELATING TO OPTICAL PROJECTION SCREENS
摘要
申请公布号
GB1279627(A)
申请公布日期
1972.06.28
申请号
GB19680033257
申请日期
1968.07.12
申请人
WILLIAM DERRICK STROUD;MELVIN JONES;VYVYAN THOMAS WILLIAMS
发明人
WILLIAM DERRICK STROUD;MELVIN JONES;VYVYAN THOMAS WILLIAMS
分类号
G03B21/60
主分类号
G03B21/60
代理机构
代理人
主权项
地址
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