I find it funny that you would only trust Instant Pot. Pressure cookers have been around for 100 years and took off after the 1939 World’s Fair. Instant Pot is the newcomer and is a Chinese-designed product. This shows how far Chinese products have come!
In 2008, Robert Wang, Yi Quin, and one other friend, all former employees of Nortel in Ottawa, Canada, started working on designs for the Instant Pot. Wang is credited as the inventor of the Instant Pot. Wang and four partners founded Double Insight Inc in 2009. Instant Pots are manufactured by the Midea Group in GuangDong, China.
Wang has a PhD in computer science with a specialty in artificial intelligence. Rather amazing going from a PhD in CS and AI to telecommunications to founding a successful pressure cooker company! That’s a great story right there.
Historically, the "steam digester" (for bones) was invented around 1690.