发明授权
- 专利标题: Film holder
- 专利标题(中): 电影持有人
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申请号: US831971申请日: 1977-09-09
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公开(公告)号: US4147662A公开(公告)日: 1979-04-03
- 发明人: Robert Schwartz
- 申请人: Robert Schwartz
- 专利权人: Robert Schwartz
- 当前专利权人: Robert Schwartz
- 主分类号: A61B6/14
- IPC分类号: A61B6/14 ; G03B42/04 ; G03B41/16 ; A61B6/04
摘要:
Reproducible panoramic x-ray photographs of the dental arches are secured with a portable film holder apparatus that is used in conjunction with an independent x-ray camera unit. The film holder is composed of a photographic plate holder assembly used in combination with a sectional photographic plate shield assembly and an x-ray camera aiming system.
公开/授权文献
- US5898048A Polyimide powder and process for producing powder molded body 公开/授权日:1999-04-27
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