发明授权
US5818624A Mask for viewing reduced-size radiographic film, particularly
mammography film
失效
用于观看尺寸较小的放射照相胶片，特别是乳房X线照相胶片的面膜
- 专利标题： Mask for viewing reduced-size radiographic film, particularly mammography film
- 专利标题（中）： 用于观看尺寸较小的放射照相胶片，特别是乳房X线照相胶片的面膜
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申请号： US579298申请日： 1995-12-27
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公开(公告)号： US5818624A公开(公告)日： 1998-10-06
- 发明人: John Patterson , Raynor Sturgis , Hugh Walborn , Lawrence Wilhelm
- 申请人： John Patterson , Raynor Sturgis , Hugh Walborn , Lawrence Wilhelm
- 专利权人： Patterson; John,Sturgis; Raynor,Walborn; Hugh,Wilhelm; Lawrence
- 当前专利权人： Patterson; John,Sturgis; Raynor,Walborn; Hugh,Wilhelm; Lawrence
- 主分类号： G02B27/02
- IPC分类号： G02B27/02 ; G02B26/02
摘要：
A radiographic film mask includes a planar sheet sized for receipt on an illuminated radiographic film examination box. The mask has two opaque sections and a transparent section. The transparent section is disposed on the sheet between the two opaque sections to form a radiographic film viewing area which has an area less than the entire area of the sheet. The sheet may include semi-transparent sections which border the viewing area and interconnect the opaque portions to provide reduced transmission of light along the marginal edges of the radiographic film.
公开/授权文献
- USD326652S Radio tuner 公开/授权日：1992-06-02
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