SEC Seal
SEC Banner
Search the Next-Generation EDGAR System
Filing Detail
Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0000912938-01-000135
Filing Date
2001-02-12
Accepted
2001-02-12 00:00:00
Documents
1

Document Format Files

Seq Description Document Type Size
1 NATURAL MICROSYSTEMS CORP. 0001.txt SC 13G 6983
  Complete submission text file 0000912938-01-000135.txt   8957
Mailing Address 500 BOYLSTON STREET 15TH FLOOR BOSTON MA 02116
Business Address 500 BOYLSTON ST 15TH FL BOSTON MA 02116 6179545261
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (Filed by) CIK: 0000912938 (see all company filings)

State of Incorp.: MA | Fiscal Year End: 1231
SIC: 0000

Mailing Address 100 CROSSING BLVD. FRAMINGHAM MA 01702
Business Address 100 CROSSING BLVD FRAMINGHAM MA 01702 5086501300
NATURAL MICROSYSTEMS CORP (Subject) CIK: 0000915866 (see all company filings)

IRS No.: 042814586 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-43813 | Film No.: 1532543
SIC: 3661 Telephone & Telegraph Apparatus