Roldan Products originally exported Crown Products jacks back in the  70's.  Crown was purchased by Hammerblow which was then purchased by the  Cequent Group. 

Cequent Performance Products includes a family of market leading  brands such as Tekonsha, Fulton, Bulldog, Bargman and Westbar covering  the trailer market. 

Fulton offers Marine and Utility Jacks, Winches, Brakes and other products.

Bulldog and Eclipse offer Standard Round Utililty Jacks, Square Jacks, Gear Boxes and other products. 

Westbar and Bargman offer vehicle/trailer lighting, and Tedonsha supplies brake controllers.