Wikimedia Commons has media related to Brands that became generic.

Pages in this category began as brands and registered trade-names but have become generic in ubiquitous, oft and common use. In some examples, the trademarks have been canceled by courts of law, some did not get renewed and simply expired into the public domain, while others became the victim of their own success, and the trade-name became a language term for the entirety of the market niche the respective brand had come to once dominate.