Copyright conflicts create chaos
Seen here as the logo from 1975 the NBC color block “N” cost the National Broadcasting Company some serious cash.
This short-lived abstract N logo was first unveiled on October 1975 and premiered on-air January 1, 1976, nicknamed the “Trapezoid N”. In 1976, a lawsuit was issued by a public television broadcaster in Nebraska named Nebraska Educational Telecommunications for potential copyright issues. The new NBC logo was virtually identical to the Nebraska ETV Network logo, except for the blue coloring in the right trapezoid of the NBC logo. An out-of-court settlement was reached in which NBC donated $800,000 worth of new equipment to Nebraska ETV, including a color mobile unit. It also paid Nebraska ETV $55,000 to cover the cost of designing and implementing a new logo. In return, NBC was allowed to keep the “N” logo. –from Logopedia, wikia site
For more on NBC click here.