Number | Name | Date | Kind |
---|---|---|---|
3994597 | Calder et al. | Nov 1976 | |
4199220 | Casagrande | Apr 1980 | |
4199257 | Dosch et al. | Apr 1980 | |
4417814 | Doliber | Nov 1983 | |
4658139 | Bennan et al. | Apr 1987 | |
5107370 | Dey | Apr 1992 |
Entry |
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Stong, "A Refracting Telescope in which the Main Lens Consists of Only One Piece of Glass", Scientific American, vol. 198, No. 5, May 1958, pp. 130-132, 134, 136, 138. |