Number | Name | Date | Kind |
---|---|---|---|
3429997 | Rosner et al. | Feb 1969 | |
3800085 | Ambats et al. | Mar 1974 | |
4530575 | Yamakawa | Jul 1985 | |
4733953 | Yamamoto et al. | Mar 1988 | |
4758074 | Yamakawa | Jul 1988 | |
4767199 | Yamamoto et al. | Aug 1988 | |
4776681 | Moskovich | Oct 1988 | |
4778264 | Matsumura et al. | Oct 1988 | |
4792218 | Nakajima et al. | Dec 1988 | |
4801196 | Betensloy | Jan 1989 | |
4815831 | Betensky | Mar 1989 | |
5015076 | Ueda | May 1991 |
Number | Date | Country |
---|---|---|
59-170812 | Sep 1984 | JPX |
59-17082 | Sep 1984 | JPX |
593514 | Oct 1947 | GBX |
1269133 | Apr 1972 | GBX |
Entry |
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Kingslake, R., Lenses In Photography, Garden City Books, 1951, pp. 131-132. |
Smith, W., "Optical Materials and Coatings," Modern Optical Engineering, McGraw Hill, 1966, pp. 145-155. |
Number | Date | Country | |
---|---|---|---|
Parent | 403139 | Sep 1989 |