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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 4797881 | Bridge system for connecting networks A large number of local area networks are each connected to a backbone network through a network interface module (NIM). The NIM transmits messages from one local area network to another local area network across the backbone network by enveloping the loc... | 01/10/1989 |
| 4639921 | Method and an apparatus for early bit collision detection Disclosed is a unit for interfacing an 82586-type local-communications controller to a modem of the type used in an RF network, the unit employing both an NRZI-to-NRZ converter which includes an algorithmic-state machine for converting packets encoded in ... | 01/27/1987 |
