UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. __1__)
3D Systems Corporation
_____________________________________________
(Name of Issuer)
Common Stock, $.001 Par Value
_______________________________________________
(Title of Class of Securities)
88554D205
_________________________________________________
(CUSIP Number)
with a copy to:
Austin W. Marxe Allen B. Levithan, Esq.
153 East 53rd Street Lowenstein Sandler PC
New York, New York 10022 65 Livingston Avenue
Roseland, New Jersey 07068
(973) 597-2406
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
December 31, 2004
(Date of Event which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
____ Rule 13d-1(b)
_x__ Rule 13d-1(c)
____ Rule 13d-1(d)
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.
The information required on the remainder of this cover page shall not be
deemed
to be ?filed? for the purpose of Section 18 of the Securities Exchange Act of
1934 (?Act?) or otherwise subject to the liabilities of that section of the
Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
Cusip No. 88554D205 13G Page 2 of 6 Pages
1.Names of Reporting Persons. I.R.S. Identification Nos. of above persons
(entities only):
Austin W. Marxe and David M. Greenhouse
2. Check the Appropriate Box if a Member of a Group (See
Instructions):
(a) [ ] Not Applicable
(b) [ ]
3. SEC Use Only
4. Source of Funds (See Instructions): 00
5. Check if Disclosure of Legal Proceedings Is Required Pursuant to
Items 2(d) or 2(e):
Not Applicable
6. Citizenship or Place of Organization: United States
Number of 7. Sole Voting Power: 0
Shares Beneficially 8. Shared Voting Power: 827,475*
Owned by
Each Reporting 9. Sole Dispositive Power: 0
Person With 10. Shared Dispositive Power: 827,475*__
11. Aggregate Amount Beneficially Owned by Each Reporting Person:
827,475*
12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares
(See Instructions): Not Applicable
13. Percent of Class Represented by Amount in Row (11): 5.9%*
14. Type of Reporting Person (See Instructions): IA, IN
* This is a joint filing by Austin W. Marxe (?Marxe?) and David M. Greenhouse
(?Greenhouse?). Marxe and Greenhouse share sole voting and investment power
over 21,023 Common Shares and a $625,000 Corporate Bond convertible into
61,395 Common Shares owned by Special Situations Cayman Fund, L.P., 52,000
Common Shares and a $1,875,000 Corporate Bond convertible into 184,185 Common
Shares owned by Special Situations Fund III, L.P., 35,000 Common Shares and a
$2,500,000 Corporate Bond convertible into 245,580 Common Shares owned by
Special Situations Private Equity Fund, L.P., 5,000 Common Shares and a
$330,000 Corporate Bond convertible into 32,416 Common Shares owned by Special
Situations Technology Fund, L.P., and 26,829 Common Shares and a $1,670,000
Corporate Bond convertible into 164,047 Common Shares owned by Special
Situations Technology Fund II, L.P. See Items 2 and 4 of this Schedule for
additional information.
Page 3 of 6 Pages
Item 1. Security and Issuer:
(a) 3D Systems Corporation
(b) 26081 Avenue Hall, Valencia, CA 91355
Item 2. (a) Name of Person Filing:
The persons filing this report are Austin W. Marxe (?Marxe?) and
David M. Greenhouse (?Greenhouse?), who are the controlling principals of AWM
Investment Company, Inc. (?AWM?), the general partner of and investment
adviser to Special Situations Cayman Fund, L.P. (?Cayman?). AWM also serves
as the general partner of MGP Advisers Limited Partnership (?MGP?), the
general partner of and investment adviser to Special Situations Fund III, L.P.
(?SSF3?). Marxe and Greenhouse are also members of MG Advisers L.L.C. (?MG?),
the general partner of and investment adviser to Special Situations Private
Equity Fund, L.P. (?SSPE?), and members of SST Advisers, L.L.C. (?SSTA?), the
general partner of and investment adviser to Special Situations Technology
Fund, L.P. (?Technology?) and Special Situations Technology Fund II, L.P.
(?Tech II?). (SSF3, Cayman, SSPE, Technology and Tech II will hereafter be
referred to as, the ?Funds?). The principal business of each Fund is to
invest in equity and equity-related securities and other securities of any
kind or nature.
(b) Address of Principal Business Office or, if none, Residence:
The principal business address for Marxe and Greenhouse is 153
East 53rd Street, 55th floor, New York, NY 10022.
(c) Citizenship:
Austin W. Marxe and David M. Greenhouse are United
States citizens.
(d) Title of Class of Securities: Common Shares
(e) CUSIP Number: 88554D205
Item 3. If this statement is filed pursuant to $240.13d-1(b) or 240.13d-
2(b), check whether
the person filing is a: Not Applicable
(a) ( ) Broker or Dealer registered under section 15 of the Act;
(b) ( ) Bank as defined in section 3(a) (6) of the Act;
(c) ( ) Insurance Company as defined in section 3(a) (19) of the Act;
(d) ( ) Investment Company registered under section 8 of the Investment
Company Act of 1940;
(e) ( ) An Investment Adviser in accordance with $240.13d
-1(b)(I)(ii)(E);
(f) ( ) An employee benefit plan or endowment fund in accordance with
$240.13d-1(b)(I)(ii)(F);
Page 4 of 6 Pages
(g) ( ) A parent holding company or control person in accordance with
$240.13d-
1(b)(1)(ii)(G);
(h) ( ) A savings association as defined in Section 3(b) of the Federal
Deposit Insurance
Act;
(i) ( ) A church plan that is excluded from the definition of an
investment company under section 3(c)(14) of the Investment
Company Act of 1940;
(j) ( ) Group, in accordance with $240.13d-1(b)(1)(ii)(J).
Item 4. Ownership:
(a) Amount Beneficially Owned: Messrs. Marxe and Greenhouse
beneficially own a total of 139,852 Common Shares and a $7,000,000 Corporate
Bond convertible into to 687,623 Common Shares. This amount includes 21,023
Common Shares and a $625,000 Corporate Bond Convertible into 61,395 Common
Shares owned by Cayman, 35,000 Common Shares and a $2,500,000 Corporate Bonds
Convertible into 245,580 Common Shares owned by SSPE, 5,000 Common Shares and
a $330,00 Corporate Bonds convertible into 32,416 Common Shares owned by
Technology, 26,829 Common Shares, $1,670,000 Corporate Bonds Convertible into
164,047 Common Shares owned by Tech II, and 52,000 Common Shares and a
$1,875,000 Corporate Bond Convertible into 184,185 Common Shares owned by
SSF3.
(b) Percent of Class: Messrs. Marxe and Greenhouse beneficially own
5.9% of the shares outstanding. Cayman owns .6% of the outstanding shares,
SSPE owns 2.1% of the outstanding shares, Technology owns 0.3% of the
outstanding shares, Tech II owns 1.4% of the outstanding shares, and SSF3 owns
1.7% of the outstanding shares.
(c) Number of Shares as to which the person has:
(i) Sole power to vote or to direct the vote: 0
(ii) Shared power to vote or to direct the vote: 827,475
(iii) Sole power to dispose or to direct the disposition of: 0
(iv) Shared power to dispose or to direct the disposition of:
827,475
Item 5. Ownership of Five Percent or Less of a Class: If this statement is
being filed to report the fact that as of the date hereof the reporting person
has ceased to be the beneficial owner of more that five percent of the class
of securities, check the following __.
Item 6.Ownership of More than Five Percent on Behalf of Another Person: Not
Applicable.
Item 7. Identification and Classification of the Subsidiary Which Acquired the
Security being Reported on By the Parent Holding Company: Not Applicable.
Page 5 of 6 Pages
Item 8. Identification and Classification of Members of the Group: Not
applicable
Item 9. Notices of Dissolution of Group: Not applicable.
Item 10.Certification:
By signing below I certify that, to the best of my knowledge and belief,
the securities
referred to above were acquired and are held in the ordinary course of
business and were not
acquired and are not held for the purpose of or with the effect of changing or
influencing the
control of the issuer of the securities and were not acquired and are not held
in connection with
or as a participant in any transaction having that purpose or effect.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated: February 12, 2004
/s/ Austin W. Marxe
AUSTIN W. MARXE
/s/David M Greenhouse
DAVID M. GREENHOUSE
Attention: Intentional misstatements or omissions of fact constitute Federal
criminal violations (See 18 U.S.C. 1001).
Page 6 of 6 Pages
JOINT FILING AGREEMENT
Austin W. Marxe and David M. Greenhouse hereby agree that the Schedule
13G to which this agreement is attached is filed on behalf of each of them.
/s/_Austin W. Marxe
Austin W. Marxe
/s/_David M. Greenhouse
David M. Greenhouse
-6-
S5313/1
1319328.02