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.
She is regarded as one of the Hollywood greats. But Audrey Hepburn couldn't act, couldn't sing and was fantastically twee, according to Emma Thompson. Thompson is writing the screenplay for a remake of My Fair Lady, the 1964 film in which Hepburn played Eliza Doolittle.