L 3 COMMUNICATIONS ILEX SYSTEMS INC

Registration of securities issued in business combination transactions

Registration of securities issued in business combination transactions

Prospectus filed pursuant to Rule 424(b)(3)

Prospectus filed pursuant to Rule 424(b)(3)

Prospectus filed pursuant to Rule 424(b)(3)

Prospectus filed pursuant to Rule 424(b)(1)

A new registration statement filed under Rule 462(b) to add securities to a prior related effective registration statement filed on Form S-1

General form of registration statement for all companies including face-amount certificate companies

General form of registration statement for all companies including face-amount certificate companies

General form of registration statement for all companies including face-amount certificate companies