发明名称 COMBINATION DIFFUSION AND VIGNETTING TOOL
摘要 A combination tool for use in photographic enlarging procedures is disclosed. The combination tool includes a diffuser arm and a vignetting arm pivotally connected together. Each arm may be used independently of the other or in combination with each other to provide diffusion while vignetting.
申请公布号 US3682075(A) 申请公布日期 1972.08.08
申请号 USD3682075 申请日期 1970.01.15
申请人 LEO H. PROFITT 发明人 LEO H. PROFITT
分类号 G03B27/72;(IPC1-7):G03B11/00 主分类号 G03B27/72
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