Timeline 2005 Dufferin Launches patented SlipStone innovation in Canada March 27, 2018/by Jessica Boseley https://dufferinconstruction.com/wp-content/uploads/2018/03/Dufferin_AboutUs_Timeline_2005.jpg 600 800 Jessica Boseley https://dufferinconstruction.com/wp-content/uploads/2019/11/Dufferin_Construction_Color_Screen-300x138.png Jessica Boseley2018-03-27 18:09:312018-03-29 15:30:032005