Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 5071238 | Telescopic camera Disclosed is a lens system for a telescopic camera comprised of a primary lens, a secondary lens and a tertiary lens. The primary lens is a positive lens having a convex front surface and an aspheric back surface which define an optical axis. The secondar... | 12/10/1991 |
