Exhibit 99.1

             Appeals Court Judgment in Vicor Patent Cases

    ANDOVER, Mass.--(BUSINESS WIRE)--May 25, 2004--Vicor Corporation
(and its wholly-owned subsidiary, VLT, Inc.) (NASDAQ: "VICR") today
announced that on May 24, 2004, the Court of Appeals for the Federal
Circuit affirmed the decisions issued in January, 2003, by the Federal
District Court, Boston, Massachusetts, in each of Vicor's patent
infringement lawsuits against Artesyn Technologies, Lambda
Electronics, Lucent Technologies and Tyco Electronics, and Power-One.
As previously reported, the District Court's decisions related to
claim construction and validity of Vicor's Reset Patent (U. S. Patent
Re. 36,098).
    The judgment affirms the validity of the patent claims; rejects
assertions that the claims are invalid for indefiniteness; and affirms
Vicor's interpretation of several terms used in the claims. However,
the Appeals Court judgment also affirms the District Court's
interpretations of certain terms that were contrary to Vicor's
position. Vicor believes that the affirmation of the District Court's
interpretations strengthens its position regarding validity of the
patent. Affirmation of the District Court's claim construction,
however, reduces the cumulative amount of infringing power supplies
and the corresponding amount of potential damages.
    Vicor plans to continue to vigorously pursue recovery of damages
from infringers. There can be no assurance that Vicor will ultimately
prevail in this litigation or, if it prevails, as to the amount of
damages that would be awarded.
    This press release contains certain forward-looking statements as
that term is defined in the Private Securities Litigation Reform Act
of 1995. You can identify these statements by our use of the words
"may," "will," "would," "plans," "expects," "anticipates," "believes,"
"continue," "estimate," "project," "intend," and similar expressions.
These forward-looking statements involve risks and uncertainties that
could cause actual results to differ materially from those projected
or anticipated. These risks and uncertainties include the ultimate
outcomes of the Company's lawsuits referenced above, as well as the
other risks and uncertainties identified in the Company's Annual
Report on Form 10-K. The risk factors contained in the Annual Report
on Form 10-K may not be exhaustive. Therefore, the information
contained in that Form 10-K should be read together with other reports
and documents that the Company files with the SEC from time to time,
which may supplement, modify, supersede or update those risk factors.

    CONTACT: Mark A. Glazer
             Chief Financial Officer
             Vicor Corporation
             Tel: 978-470-2900
             Fax: 978-749-3439