Impax Laboratories, LLC Watch

from SC 13D 1 page Joint Filing Agreement

from SC 13D/A 1 page <page> Exhibit 1 Joint Filing Agreement as Required by Rule 13d-1(k)(1) of Regulation 13d of the General Rules and Regulations of the Securities and Exchange Act of 1934, as Amended, Each Reporting Person on Whose Behalf This Statement Is Filed Agrees That This Statement Is, and Any Subsequent Amendments Hereto Will Be Filed on Behalf of Each of Them. Each Reporting Person Understands That They Are Responsible for the Timely Filing of This Statement and Any Amendments Thereto and for the Completeness and Accuracy of the Information Concerning Such Reporting Person Contained Herein; Each Reporting Person Understands That They Are Not Responsible for the Completeness or Accuracy of the Information Concerning the Other Reporting Persons Making This Filing Unless Such Reporting Person Knows or Has Reason to Believe That Such Information Is Inaccurate. This Statement May Be Executed in More Than One Counterpart. Dated: June 15, 2004 /S/ Larry (Chung-Chiang) Hsu, PH.D. Larry (Chung-Chiang) Hsu, PH.D. /S/ Ann (Fung-Hwa) Hsu Ann (Fung-Hwa) Hsu <page> Appendix 1 Information Required by Item 2 for Each of the Reporting Persons <table> <caption> Place of Present Principal Reporting Person Business Address Organization/Citizenship Occupation - <s> <c> <c> <c> Larry (Chung-Chiang) 30831 Huntwood Ave. United States President, Impax Hsu, PH.D. Hayward, Ca 94544 Laboratories, Inc. (30831 Huntwood Ave. Hayward, Ca 94544) Ann (Fung-Hwa) Hsu 30831 Huntwood Ave. United States Consultant, Impax Hayward, Ca 94544 Laboratories, Inc. (30831 Huntwood Ave. Hayward, Ca 94544) </Table>

from SC 13D/A ~5 pages Joint Filing Agreement

from SC 13D/A 1 page <page> Exhibit 1 Joint Filing Agreement Pursuant to and in Accordance With Rule 13d-1(k)(1) Under the Securities Exchange Act of 1934, the Undersigned Hereby Agree to Jointly File the Schedule 13d/a No. 3 Dated July 31, 2002 and Any Amendments Thereto With Respect to the Beneficial Ownership by Each of the Undersigned of Shares of Common Stock of Impax Laboratories, Inc. Such Joint Filings May Be Executed by One or More of US on Behalf of Each of the Undersigned. This Agreement May Be Executed in Any Number of Counterparts, Each of Which Shall Be Deemed an Original. Executed This 31st Day of July, 2002. Chemical Company of Malaysia Berhad /S/ Oh Kim Sun Oh Kim Sun, Group Executive Director /S/ Oh Kim Sun Oh Kim Sun Ccm Investments Limited /S/ Oh Kim Sun Oh Kim Sun, Group Executive Director

from SC 13D/A 1 page <page> Exhibit 1 Joint Filing Agreement Pursuant to and in Accordance With Rule 13d-1(k)(1) Under the Securities Exchange Act of 1934, the Undersigned Hereby Agree to Jointly File the Schedule 13d/a No. 3 Dated December 27, 2001 and Any Amendments Thereto With Respect to the Beneficial Ownership by Each of the Undersigned of Shares of Common Stock of Impax Laboratories, Inc. Such Joint Filings May Be Executed by One or More of US on Behalf of Each of the Undersigned. This Agreement May Be Executed in Any Number of Counterparts, Each of Which Shall Be Deemed an Original. Executed This 27th Day of December, 2001. China Development Industrial Bank Inc. By: /S/ Chin-Men Kao Name: Chin-Men Kao Title: First Vp and General Manager Overseas Investment Management Cdib Venture Investment (USA), Ltd. By: /S/ Chin-Men Kao Name: Chin-Men Kao Title: President

from SC 13D/A ~50 pages Sales Agency Agreement

from SC 13D/A 1 page <page> Exhibit 1 Joint Filing Agreement Pursuant to and in Accordance With Rule 13d-1(k)(1) Under the Securities Exchange Act of 1934, the Undersigned Hereby Agree to Jointly File the Schedule 13d/a Dated July 19, 2001 and Any Amendments Thereto With Respect to the Beneficial Ownership by Each of the Undersigned of Shares of Common Stock of Impax Laboratories, Inc. Such Joint Filings May Be Executed by One or More of US on Behalf of Each of the Undersigned. This Agreement May Be Executed in Any Number of Counterparts, Each of Which Shall Be Deemed an Original. Dated: July 19, 2001 Fleming US Discovery Fund III, L.P. By: Fleming US Discovery Partners, L.P., Its General Partner By: Fleming US Discovery, LLC, Its General Partner By: /S/ Robert L. Burr Robert L. Burr, Member Fleming US Discovery Offshore Fund III, L.P. By: Fleming US Discovery Partners, L.P, Its General Partner By: Fleming US Discovery, LLC, Its General Partner By: /S/ Robert L. Burr Robert L. Burr, Member Fleming US Discovery Partners, L.P. By: Fleming US Discovery, LLC, Its General Partner By: /S/ Robert L. Burr Robert L. Burr, Member Fleming US Discovery, LLC By: /S/ Robert L. Burr Robert L. Burr, Member Robert Fleming Inc. By: /S/ Christopher M.V. Jones Christopher M.V. Jones, Director J.P. Morgan Chase & Co. By: /S/ Susan S. Spagnola Susan S. Spagnola, Assistant Corporate Secretary

from SC 13D/A ~1 page Underwriting agreement

from SC 13D/A 1 page Joint Filing Agreement Pursuant to and in Accordance With Rule 13d-1(k)(1) Under the Securities Exchange Act of 1934, the Undersigned Hereby Agree to Jointly File the Schedule 13d/a Dated May 12, 2000 and Any Amendments Thereto With Respect to the Beneficial Ownership by Each of the Undersigned of Shares of Common Stock of Impax Laboratories, Inc. Such Joint Filings May Be Executed by One or More of US on Behalf of Each of the Undersigned. This Agreement May Be Executed in Any Number of Counterparts, Each of Which Shall Be Deemed an Original. Executed This 12th Day of May, 2000. Fleming US Discovery Fund III, L.P. By: Fleming US Discovery Partners, L.P., Its General Partner By: Fleming US Discovery, LLC, Its General Partner By: /S/ Robert L. Burr Robert L. Burr, Member Fleming US Discovery Offshore Fund III, L.P. By: Fleming US Discovery Partners, L.P., Its General Partner By: Fleming US Discovery, LLC, Its General Partner By: /S/ Robert L. Burr Robert L. Burr, Member Fleming US Discovery Partners, L.P. By: Fleming US Discovery, LLC, Its General Partner By: /S/ Robert L. Burr Robert L. Burr, Member Fleming US Discovery, LLC By: /S/ Robert L. Burr Robert L. Burr, Member Robert Fleming, Inc. By: /S/ Arthur A. Levy Arthur A. Levy, Director Robert Fleming Holdings, Ltd. By: /S/ Arthur A. Levy Arthur A. Levy, Director

from SC 13D/A ~5 pages Joint Filing Agreement