History of electrochemistry
In 1789, Franz Aepinus developed a device with the properties of a "condenser" (now known as a capacitor.) The Aepinus condenser was the first capacitor developed after the Leyden jar, and was used to demonstrate conduction and induction. The device was constructed so that the space between two plates could be adjusted, and the glass dielectric separating the two plates could be removed or replaced with other materials.
Dubilier Condenser Company
The Dubilier Condenser Company was the earliest commercial manufacturer of electronic capacitors, formerly known as condensers, which were widely used in early radio receivers (wireless sets). The company was founded in New York in 1920, by William Dubilier, who was responsible for many early developments in the field of electronics and radio, including the use of mica in capacitors. Dubilier was a name commonly found on capacitors in early wireless sets in Britain alongside TCC, Wima, and others. Dubilier Condenser was later merged into Cornell Dubilier.