Harmon Industries: How a Missouri Radio Shop Built American Signal Equipment
Harmon Industries started in 1946 as one man's radio shop in Independence, Missouri. Fifty-four years later GE paid about $425 million for it. The story of the hotbox relays, crossing predictors, coded track circuits and cab signals that got it there, and of the product lines that still carry its work under KB Signaling.
Justin Morrison•2026-11-14