Complex sentence: By the 1950s, systems were created to cancel the noise in helicopter and airplane cockpits including those patented by Lawrence J. Fogel in the 1950s and 1960s such as,, and Canadian patent 631,136.
Split into simpler sentences: By the 1950s, systems were created to cancel the noise in airplane cockpits. Patents were granted to Lawrence J. Fogel in the 1950s and 1960s including,, and Canadian patent 631,136.