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 |
| 4266998 | Method for producing double-faced corrugated boards This method is a method producing double-faced corrugated boards which includes methods for changing single-faced corrugated boards. The methods comprise the steps of cutting a single-faced corrugated board which is fed from a single facer onto a bridge a... | 05/12/1981 |