He developed Electrical Porcelain with transmission engineers at GE. His family continued to work at Building 68 in Schenectady for decades. William's son Frank Cermak advanced insulator design into the mid 20th century.
When Rex Harrison accepted his Academy Award for My Fair Lady (1964), he dedicated it to his two fair ladies, Audrey Hepburn and Julie Andrews both who had played Eliza Doolittle with him.
Of her part in On the Riviera (1951), Bosley Crowther commented that she was pretty, but neglected (NY Times May 24th, 1951). Corinne (Miss Golden Globe 1952), later gave vent to her frustration at having never been given a proper chance to display her acting range in her 1983 memoir 'Has Corinne Been a Good Girl?'.