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A kissing shield comprised of a thin, flexible membrane and a frame or holder.
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| Number | Title | Issue Date |
| 4898453 | Macrolens assembly having a distance adjustment of more than 360 degrees A macrolens assembly which has two distance setting rings which are coaxially arranged and are fitted into each other and each of which has on its radial exterior a distance scale. A control window is provided in the lens mount and in the outermost distan... | 02/06/1990 |
