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H6-318474 | Dec 1994 | JPX | |
H7-001253 | Jan 1995 | JPX |
Number | Name | Date | Kind |
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4968117 | Chern et al. | Nov 1990 | |
5159495 | Hamblen | Oct 1992 | |
5327290 | Fukushima et al. | Jul 1994 | |
5638479 | Takami et al. | Jun 1997 |
Number | Date | Country |
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2051116 | Aug 1988 | JPX |
4063312 | Jul 1990 | JPX |
Entry |
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"Design of a Gradient-Index Photographic Objective", by L. Atkinson, Applied Optics, vol. 21, No. 6, Mar. 15, 1992. |