Mortgage lender groups are prodding GSE regulators to take a closer look at applications for patents filed by Fannie Mae and Freddie Mac. Echoing a recent brouhaha over Fannie’s construction financing program, questions are being raised about possible conflicts with the GSEs’ charters when they seek patents for certain business processes and systems. The Office of Federal Housing Enterprise Oversight and the Department of Housing and Urban Development are reportedly reviewing some of the patents, and one industry lobbyist...