Wikipedia gives me the following list of minor professional leagues in NA:
Minor professional
American Hockey League (1936) (United States; Canada)
ECHL (1988 as East Coast Hockey League) (United States)
Central Hockey League (1992) (United States; Canada)
Southern Professional Hockey League (2004) (United States)
Ligue Nord-Américaine de Hockey (2004) (Canada)
Federal Hockey League (2010) (United States; Canada)
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