yea that's true most of invented things have been stolen from Arabs in 20th Century by most of Europeans especially British and France that's the period they got large Empire around the world ,you may heard about the largest Library in The Constantinople that's Imperial Library
some says according to wikipedia
In 1204, the library became a target of the knights of the Fourth Crusade. The library itself was destroyed and its contents burned or sold. The great part of the library that was saved later became absorbed into the Ottoman Sultan's library after the Muslim forces of Mehmed II captured Constantinople, Sultan of the Ottoman Turks, at the end of the siege of 1453.
that's how Arabs got their knowledge via that Great Library instead it's not their own knowledge
after the destruction of Ottoman Empire most of valuable things were carried over to Western World