OK Cases on WestlawSupreme Court of the Territory of Oklahoma: 1890 - 1907; Court of Appeals of Indian Territory: 1895 - 1907; Supreme Court: begins with 1907; Court of Criminal Appeals: begins with 1908; Court of Civil Appeals: begins with 1967; Court of the Judiciary: begins with 1968.
OK Cases on LexisOK Court of Appeals Cases from 1968; OK Court of Criminal Appeals from 1908; OK Court on the Judiciary, Appellate Division.
OK Cases on Bloomberg LawSupreme Court of Oklahoma 1890 to Current; Oklahoma Court of Criminal Appeals 1908 to Current; Court of Civil Appeals 1968 to Current; Judicial Ethics Advisory Panel 1998 to Current; Court of the Judiciary 1968 to 2002; Court of Appeals of Indian Terr. 1895 to 1907.
Try searching for dockets on the court's web site. The National Center for State Courts offers judicial branch links for each state, focusing on the administrative office of the courts, the court of last resort, any intermediate appellate courts, and each trial court level.