Exhibit 10.55 SUPPLEMENTAL INDENTURE TO BE DELIVERED BY GUARANTEEING SUBSIDIARIES Supplemental Indenture (this "Supplemental Indenture"), dated as of May 10, 2005, among L-3 Communications Corporation (or its permitted successor), a Delaware...Supplemental Indenture • May 10th, 2005 • L 3 Communications Holdings Inc • Radio & tv broadcasting & communications equipment • New York
Exhibit 10.63 SUPPLEMENTAL INDENTURE TO BE DELIVERED BY GUARANTEEING SUBSIDIARIES Supplemental Indenture (this "Supplemental Indenture"), dated as of May 10, 2005, among L-3 Communications Corporation (or its permitted successor), a Delaware...Supplemental Indenture • May 10th, 2005 • L 3 Communications Holdings Inc • Radio & tv broadcasting & communications equipment • New York
