History
The first successful electronic organ was developed in 1928 in France by Edouard Coupleux and Armand Givelet. It used electronic oscillators in place of the pipes of a conventional organ and was operated with keyboards and a pedal board.

One of the most important and well known of the electronic organs is the Hammond organ, a sophisticated instrument having two manuals, or keyboards, and a set of pedals operated by the feet. It was patented by its American inventor Laurens Hammond in 1934. Unlike most other instruments of its type, it produces its sound through a complex set of rotary, motor-driven generators. By means of a series of controls affecting the harmonics, or component tones, of the sound, a great variety of timbres (tone colours) can be reproduced that to some degree imitate the sound of other instruments, such as the violin, the flute, the oboe, and the orchestral percussion instruments. (source Britannica)

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Some of the selection under the Electric Organs tab are yet to be constructed

Completed

Not Completed

Baldwin, Conn, Thomas, Wurlitzer, Demo Cassettes and Organists

JVC, Lowrey, Tecnics, Roland, Wersi, Yamaha, Leslie
 

Hammond works are in process