"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 5107262 | Modular retroactive keyboard and a flat modular actuator A modular retroactive keyboard fitted with keys permitting to send back to the user a perception characteristic of the key. Each key is an element of an independent flat and parallelepipedic module that includes a motor, a position detector and an electri... | 04/21/1992 |