Which country invented USB flash drive?

Which country invented USB flash drive? As far as I know, Netac owns the patent of USB flash drive, but there is no patent of USB flash drive or USB flash drive. Just like "micro-single" is a registered trademark of Sony. Other manufacturers don't have to pay Netac as long as they don't use the name USB flash drive. When flash drives first became popular, Netac was quite popular. Objectively speaking, the quality of Netac's products is ok. I also have a Netac 32M disk, but the price of Netac's products has always been relatively expensive and completely uncompetitive. The first USB flash drive invented in the world was really Netac. The registered trademarks at that time were USB flash drive and USB flash drive. Later, many companies also launched their own products accordingly. Because the word "USB flash drive" on the package involves Netac's patent, it was changed to USB flash drive, and the slow USB flash drive became the most popular saying in the market.

In fact, the emergence of u disk is a matter of course; 1994- 1995 has zip driver and Jaz driver of 100M; There is 1G on the market. The old SD card and CF card with flash memory media have been widely used, and what is missing is only a usb interface. Later, SD and CF card readers with USB ports appeared, and the cover is no different from a U disk. There will be a USB flash drive in the back. The market demand of flash memory +USB port +win98 plug-and-play driver+large capacity mobile storage, no matter who is short of, the world will invent a USB flash drive. There is no necessary connection between invention and selling well. As long as you have an idea, you don't even need a product, but it's much harder to sell it well. It is not enough to design and produce well, spread sales channels, establish and maintain brand image, but also to control costs. In addition, it is a bit embarrassing to say that the USB flash drive was not invented by Netac, and the patent is clearly written in black and white.