Tubes of Steel of Mexico Sa Sample Contracts

Tubes of Steel of Mexico Sa – LICENSE AGREEMENT (June 30th, 2003)

EXHIBIT 4.2 ================================================================================ TENARIS PREMIUM CONNECTIONS TECHNOLOGY LICENSE AGREEMENT BY AND BETWEEN TENARIS CONNECTIONS BV. AND TUBOS DE ACERO DE MEXICO S.A. DATED JULY 10, 2002 ================================================================================ TABLE OF CONTENTS Page ----

Tubes of Steel of Mexico Sa – ATLAS BRADFORD TECHNOLOGY SUBLICENSE AGREEMENT (June 30th, 2003)

EXHIBIT 4.1 ================================================================================ ATLAS BRADFORD TECHNOLOGY SUBLICENSE AGREEMENT by and between TENARIS CONNECTIONS BV. and TUBOS DE ACERO DE MEXICO S.A. Dated May 24, 2002 ================================================================================ ATLAS BRADFORD TECHNOLOGY SUBLICENSE AGREEMENT This Atlas Bradford Technology Sublicense Agreement (this "Agreement") is entered into as of May 24, 2002, by and between Tenaris Connection BV, a corporation organized and existing under the laws of The Netherlands, having its offices at Shiphol Boulevard 271, 1118 BH, Luchthaven Shiphol, Amsterdam (hereinafter referred to as "Tenaris") a wholly-owned subsidiary