in 2017, a Chinese company named "Midea" applied for patenting of Bitcoin mining in normal household appliances (an act that could truely decentralize Bitcoin network beyond CPU, GPU and ASICS)
This is a brilliant idea and should be explored by many other appliance companies on the planet to truly expand the Bitcoin network making it invincible...
https://cointelegraph.com/news/chinese-producer-embeds-bitcoin-mining-chips-in-household-appliances