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Trademark Assignment Assignor Details

Assignor Name : ICARUS CORPORATION

Total Assignments: 2

Assignment: 1

Reel/Frame:	2320/0747	View Recorded Assignment		Pages:	9
		Recorded:	06/21/2001
Conveyance:	MERGER

Assignor

1

ICARUS CORPORATION

Exec Dt:	08/29/2000
Entity Type:	CORPORATION
Citizenship:	MARYLAND

Assignee

1

IRIS ACQUISITION CORPORATION

600 JEFFERSON PLAZA, FIFTH FLOOR

ROCKVILLE, MARYLAND 20852-1150

Entity Type:	CORPORATION
Citizenship:	MARYLAND

Properties

	Ser. #	Reg. #		Ser. #	Reg. #		Ser. #	Reg. #		Ser. #	Reg. #		Ser. #	Reg. #
	72368079	947465		73115481	1088288		73727236	1519653		74051352	1675542		74074210	1715096
	74618448	2064363		74618861	2064364		74618862	2064365		75170905	2105194		75170906	2097664
	75170907	2099344		75170913	2097665		75170914	2148790		75170915	2119400		75449500	2346172
	75450246	2388270		75451523	2339166		75628101	2407818		75628102	2513749		75628103	2407819
	75628104	NONE		75631877	2508443		75687005	2454246

Correspondence name and address
	STEVENS, DAVIS, MILLER & MOSHER LLP
	BARTH X. DEROSA
	1615 L STREET NW, SUITE 850
	WASHINGTON, DC 20036

Assignment: 2

Reel/Frame:	2373/0982	View Recorded Assignment		Pages:	4
		Recorded:	09/21/2001
Conveyance:	ASSIGNS THE ENTIRE INTEREST

Assignor

1

ICARUS CORPORATION

Exec Dt:	09/13/2001
Entity Type:	CORPORATION
Citizenship:	MARYLAND

Assignee

1

ASPEN TECHNOLOGY, INC.

TEN CANAL PARK

CAMBRIDGE, MASSACHUSETTS 02141-2201

Entity Type:	CORPORATION
Citizenship:	DELAWARE

Properties

	Ser. #	Reg. #		Ser. #	Reg. #		Ser. #	Reg. #		Ser. #	Reg. #		Ser. #	Reg. #
	72368079	947465		73115481	1088288		73727236	1519653		74051352	1675542		74074210	1715096
	74618448	2064363		74618861	2064364		74618862	2064365		75170905	2105194		75170906	2097664
	75170907	2099344		75170913	2097665		75170914	2148790		75170915	2119400		75449500	2346172
	75450246	2388270		75451523	2339166		75628101	2407818		75628102	2513749		75628103	2407819
	75628104	NONE		75631877	2508443		75687005	2454246

Correspondence name and address
	STEVENS, DAVIS, MILLER & MOSHER, LLP
	BARTH X. DEROSA
	1615 L ST., SUITE 850
	WASHINGTON, D.C. 20036

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