1942: Several years after the deaths of Gardiner and Reed, the firm becomes Davis Polk Wardwell Sunderland & Kiendl, adding Edwin S. S. Sunderland and Theodore Kiendl as name partners. The firm's name will be unchanged for more than 20 years.

1944: Kiendl successfully represents Erie Railroad in the well-publicized Supreme Court case Erie v. Tompkins, in which Justice Louis D. Brandeis formally ends the 90-year-old doctrine of a federal common law.

1948: Davis defends Loew’s and other film companies in the landmark antitrust case of U.S. v. Paramount.