Exhibit 3.18

CERTIFICATE OF INCORPORATION

OF

IPG (US) Inc.

The undersigned incorporator, for the purpose of incorporating or organizing a corporation under the General Corporation Law of the State of Delaware, certifies:

FIRST: The name of the corporation is

IPG (US) Inc.

SECOND: The address of the Corporation’s registered office in the State of Delaware is 15 East North Street, in the City of Dover, County of Kent. The name of its registered agent at such address is United Corporate Services, Inc.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of Delaware.

FOURTH: The total number of shares of stock which the Corporation shall have authority to issue is One Thousand (1,000) shares, all of which will be designated Common Stock, par value $.01 per share.

FIFTH: The name and mailing address of the incorporator is Kathryn Plunkett, Morgan, Lewis & Bockius LLP, 101 Park Avenue, New York, New York 10178-0060.

SIXTH: Elections of directors need not be by ballot unless the By-Laws of the Corporation shall so provide.

SEVENTH: The Board of Directors of the Corporation may make By-Laws and from time to time may alter, amend or repeal such By-Laws.

EIGHTH: No director of the Corporation shall be liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except for liability (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the Delaware General Corporation Law, or (iv) for any transaction from which the director derived an improper personal benefit.

NINTH: Whenever a compromise or arrangement is proposed between this Corporation and its creditors or any class of them and/or between this Corporation and its stockholders or any class of them, any court of equitable jurisdiction within the State of Delaware may, on the application in a summary way of this Corporation or of any creditor or stockholder thereof or on the application of any receiver or receivers appointed for this Corporation under the provisions of section 291 of Title 8 of the Delaware Code or on the application of trusties in dissolution or of any receiver or receivers appointed for this Corporation

under the provisions of section 279 of Title 8 of the Delaware Code order a meeting of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this Corporation, as the case may be, to be summoned in such manner as the said court directs. If a majority in number representing three-fourths in value of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this Corporation, as the case may be, agree to any compromise or arrangement and to any reorganization of this Corporation as consequence of such compromise or arrangement, the said compromise or arrangement and the said reorganization shall, if sanctioned by the court to which the said application has been made, be binding on all the creditors or class of creditors, and/or on all the stockholders or class of stockholders, of this Corporation, as the case may be, and also on this Corporation.

IN WITNESS WHEREOF, I have signed this Certificate this 12th day of September, 1997.

/s/ Kathryn Plunkett

Kathryn Plunkett, Incorporator

CERTIFICATE OF AMENDMENT’

OF

CERTIFICATE OF INCORPORATION

IPG (US) Inc., a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “Corporation”),

DOES HEREBY CERTIFY:

FIRST: That the Hoard of Directors of the Corporation, by the unanimous written consent of its members, filed with the minutes of the Board, adopted a resolution proposing and declaring advisable the following amendment to the Certificate of Incorporation of said corporation:

RESOLVED, that the Fourth Article of the Certificate of incorporation of the Corporation be amended to increase the number of shares of Common Stock which the corporation shall have authority to issue to test thousand, and that as so amended said Article shall be and read as follows:

FOURTH: The total number of sham of stock which the Corporation shall have authority to issue is Ten Thousand (10,000) shares of Common Stock, and the par value of each such share is $.01.

SECOND: That in lieu of a meeting and vote of stockholders of the Corporation, the stockholders of the Corporation have given unanimous written consent to said amendment in accordance with the provisions of Section 228 of the General Corporation Law of the State of Delaware.

THIRD: That the aforesaid amendment was duly adopted in accordance with the applicable provisions of Sections 242 and 228 of the General Corporation Law of the State of Delaware.

FOURTH: That the aforesaid amendment and this Certificate of Amendment shall each be deemed to be effective as of March 16, 1999.

IN WITNESS WHEREOF, said IPG (US) INC. has caused this certificate to be signed by F. Stephanie Worth, its Assistant Secretary, this 25 day of March, 1999.

IPG (US) INC.
By:	/s/ F. Stephanie Worth
Name:	F. Stephanie Worth
Title:	Assistant Secretary

CERTIFICATE OF CHANGE OF LOCATION OF REGISTERED OFFICE

AND OF REGISTERED AGENT

It is hereby certified that.

1. The name of the corporation (hereinafter called the “corporation”) is IPG (US) INC.

2. The registered office of the corporation .within the State of Delaware is hereby changed to 1013 Centre Road, City of Wilmington 19805, County of New Castle.

3. The registered agent of the corporation within the State of Delaware is hereby changed to Corporation Service Company, the business office of which is identical with the registered office of the corporation as hereby changed.

4. The corporation has authorized the changes hereinbefore set forth by resolution of its Board of Directors.

Signed on

By:	/s/ F. Stephanie Worth
	Stephanie Worth, Assistant Secretary