These patterns are transformative art and the purpose is to display your pride in a legitimate way.   If you intend to use them commercially, you are encouraged to pay proper royalties on commercial products to the respective copyright holders.
Similar to people making cover songs on YouTube, these patterns are in tribute to the brands and ideas they may represent.    More information can be found here on Wikipedia.

*All logos are copyrighted by their respective owner and are to be used in accordance with their brand guidelines.    Colors may vary from monitor to monitor.