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发明名称
PULL DOWN MECHANISM FOR PROJECTION MACHINE
摘要
申请公布号
US3460888(A)
申请公布日期
1969.08.12
申请号
USD3460888
申请日期
1967.04.12
申请人
PANOPIX RESEARCH INC.
发明人
LEON W. WELLS
分类号
G03B21/44;(IPC1-7):G03B41/00
主分类号
G03B21/44
代理机构
代理人
主权项
地址
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