Henri Busignies, 75, an electronic and communications engineer and chief scientist emeritus of the International Telephone and Telegraph corp., died of a heart attack Friday at Antibes on the French Rivera, according to an ITT spokesman.

Dr. Busignies, a longtime resident of Montclair, N.J., was vacationing with his wife when he was stricken.

An internationally recognized authority on radio navigation and radio-direction finding, he held more than 140 patents in air navigation, radar and communications.

According to a company spokesman, his invention included the world's first automatic direction-finder for aircraft, for which he received the Pioneer Award of the Aeronautical and Navigational Electronics Group of the Institute of Radio Engineers. He also invented the moving-target-indicator radar used at airports world-wide for navigation and traffic control.

During World War II, he developed the high-frequency radio-direction-finding system known as "Huff-Duff," which was a vital factor in the war on enemy submarines.

Dr. Busignies was born in Sceaux France, on Dec. 29, 1905. He earned a degree in electrical engineering in Paris in 1926. He held honorary degrees from the Newark College of Engineering in New Jersey and the Polytechnic Institute of Brooklyn.

In 1928, he joined ITT's Paris laboratories as an engineer. A naturalized citizen, he came to the United States in 1940 and played a major role in the founding and growth of the corporation's U.S. activities. He became a vice president and general technical director of the ITT parent corporation in 1960, and was named a senior vice president in 1965. He had served as a consultant since retiring from active service in 1975.

Survivors include his wife of 49 years, the former Cecile Phaeton; a daughter, Monique Stolz, and two granddaughters.