Exhibit 10.21 AMENDMENT NO. 4 AND WAIVER dated as of May 10, 2002 (this "Amendment"), to the Credit Agreement dated as of June 28, 1999, as amended and restated as of July 21, 1999, as amended (the "Credit Agreement"), among Knowles Electronics...Credit Agreement • May 22nd, 2002 • Knowles Electronics Holdings Inc • Electromedical & electrotherapeutic apparatus • New York
Exhibit 10.20 AMENDMENT NO. 3 dated as of December 12, 2001 (this "Amendment"), to the Credit Agreement dated as of June 28, 1999, as amended and restated as of July 21, 1999 and as amended on December 23, 1999 and on April 10, 2000 (the "Credit...Credit Agreement • May 22nd, 2002 • Knowles Electronics Holdings Inc • Electromedical & electrotherapeutic apparatus • New York
EXHIBIT B INVESTOR FUNDING AGREEMENT dated as of May 10, 2002, among KEY ACQUISITION, L.L.C., a Delaware limited liability company (the "Investor"), KNOWLES ELECTRONICS HOLDINGS, INC., formerly known as Knowles Electronics, Inc., a Delaware...Investor Funding Agreement • May 22nd, 2002 • Knowles Electronics Holdings Inc • Electromedical & electrotherapeutic apparatus • New York
