Chemicals and 2 other

Owner

IGEN INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN INTERNATIONAL, INC.

—

Chemicals and 4 others

Owner

IGEN INTERNATIONAL, INC.

—

Chemicals and 2 other

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus

Owner

IGEN INTERNATIONAL, INC

—

Telecommunications

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus and 2 other

Owner

IGEN INTERNATIONAL, INC.

—

Chemicals

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus and 2 other

Owner

IGEN INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus

Owner

IGEN INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus

Owner

IGEN INTERNATIONAL, INC.

—

Electrical and Scientific Apparatus

Owner

IGEN INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN, INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN, INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN INTERNATIONAL, INC.

—

Computer and Scientific

Owner

IGEN INTERNATIONAL, INC.

—

Chemicals

Owner

IGEN INTERNATIONAL, INC.

Feb 8, 1994