The Janney was later redesigned, adding the overhead valve architecture perfected by Walter Marr and Enos Anson DeWaters, who had previously worked for the Thomas Motor Company and Cadillac before joining Buick in 1904.
The Janney underwent a redesign, incorporating the advanced overhead valve technology developed by Walter Marr and Enos Anson DeWaters, who had previously worked at the Thomas Motor Company and Cadillac before joining Buick in 1904, reflecting changes in automotive engineering during that period.