Current compressed air dryer types include the following products: 1  Refrigerant type: Cycling. 2  Regenerative desiccant type: Heatless (no internal or external heaters) Heated (internal or external heaters) Heat of Compression. 3  Single Tower Deliquescent. 4  Membrane.
History. Canadian Marcellus Gilmore Edson (February 7, 1849 â March 6, 1940) of Montreal, Quebec was the first to patent peanut butter, in 1884. Peanut flour already existed. His cooled product had a consistency like that of butter, lard, or ointment according to his patent application.
The Peanut Man. Carver invented all kinds of things made out of peanuts. He wrote down more than 300 uses for peanuts, including peanut milk, peanut paper, and peanut soap. Carver thought that if farmers started making things out of peanuts, they'd have to buy fewer things and would be more self-sufficient.