While still in high school, Farnsworth conceived the idea of an 'image dissector' tube, which would electronically scan an image and convert it into an electrical signal for transmission. This was a crucial step in his vision of all-electronic television.

Farnsworth secured funding from George Everson and Leslie Gorrell, who became his initial investors. He then established a laboratory in San Francisco to begin experimenting with his television concept.

Farnsworth successfully transmitted the first all-electronic television image - a simple straight line. This marked a pivotal moment in the history of television and validated his theoretical concepts.

Farnsworth gave his first public demonstration of his electronic television system to the press. The demonstration showcased the ability to transmit and display moving images electronically, generating significant media attention.

Farnsworth received crucial patents for his electronic television technology, including the image dissector tube. These patents became central to the legal battles with RCA and other companies.

Farnsworth continued to improve his television technology, focusing on enhancing image quality, increasing transmission range, and developing practical applications for his invention. He worked on both the transmitter (image dissector) and the receiver (cathode ray tube).