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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 |
| 4038643 | Microprogramming control system Improved means and methods for controlling the sequencing and branching of microinstructions in a microprogrammed digital data processing system. Microinstructions are stored without replication in a programmable read-only control memory and corresponding... | 07/26/1977 |
| 4016409 | Longitudinal parity generator for use with a memory Longitudinal parity is continuously provided for a predetermined plurality of words stored in a digital memory in a simple and expeditious manner without interfering with normal memory operation. The outputs of the memory read and write registers are appl... | 04/05/1977 |
