Oven gas stove included the AGA cooker invented in 1922 by Gustaf Dalén. The first electric ovens were invented in the very late 19th century, however, like many electrical inventions destined for commercial use, mass ownership of electrical ovens could not be a reality until better and more efficient use of electricity was available. More recently, ovens have become slightly more high-tech in terms of cooking strategy. The microwave as a cooking tool was discovered by Percy Spencer in 1946, and with the help from engineers, the microwave oven was patented. The microwave oven uses microwave radiation to excite the molecules
Percy Pig Percys are also now available – primarily the dark pink jelly as opposed to the light pink foam. In May 2010, Marks and Spencer launched a limited edition Piglet's Big Match for the World Cup. In March 2012, Percy in The Pink sweets were launched in M&S stores. These white bite-size Percy Pigs flavoured with dried raspberry and strawberry are free from artificial flavours and colourings. In 2014, "Globetrotting Percy" sweets were released featuring Percy, along with panda and tiger flavoured gummy sweets. In 2016, "Percy's Percynalities" were released, imitating the popular emojis. Similar sweets are available from other retailers.