Nano-Proprietary Hires John Ruberto as Senior Vice President

    AUSTIN, Texas, April 27 /PRNewswire-FirstCall/ -- Austin, Texas-based
 Nano-Proprietary, Inc. (OTC Bulletin Board:   NNPP) today announced that
 effective May 1, 2005, Mr. John Ruberto will join its subsidiary company
 Applied Nanotech, Inc. as Senior Vice President - Government Business.
 Mr. Ruberto has previously been a consultant to the Company since
 November 2004.
     Mr. Ruberto brings with him over 35 years of business leadership,
 corporate development, program management, and business development expertise
 encompassing executive and senior leadership roles with the aerospace and
 defense business units of United Technologies Corporation, GenCorp and Eagle
 Picher Industries. John also served as a Principal Deputy Assistant to the
 Secretary of Defense where he managed all system acquisition responsibilities
 for many of our country's most important defense programs.
     "With Applied Nanotech's impressive portfolio of intellectual property and
 'can do' attitude, I am looking forward to being part of a team that can
 provide innovative solutions to challenging problems," said John Ruberto.
     "We are pleased to add someone of John's caliber to our management team,"
 said Marc Eller, chief executive officer of Nano-Proprietary. "As our
 technologies begin maturing to the revenue producing stage, it is important to
 bring in someone that has the contacts and experience to expedite the process
 to revenue growth," continued Eller.
     In addition, Nano-Proprietary announced that it has received an
 unqualified opinion from its auditors, Sprouse & Anderson, L.L.P., related to
 its internal control over financial reporting. As required by Section 404 of
 the Sarbanes-Oxley Act, Nano-Proprietary management has assessed its controls
 over financial reporting and concluded that they were adequate. The
 unqualified opinion by Sprouse & Anderson indicates that they agree with
 management's assessment. Nano-Proprietary will file an amended Annual Report
 on Form 10K to include this information, as required by the Securities and
 Exchange Commission.
     Safe Harbor Statement
     This press release contains forward-looking statements that involve risks
 and uncertainties concerning Nano-Proprietary's business, products, and
 financial results. Actual results may differ materially from the results
 predicted. More information about potential risk factors that could affect our
 business, products, and financial results are included in Nano-Proprietary's
 annual report on Form 10-K/A for the fiscal year ended December 31, 2004, and
 in reports subsequently filed by Nano-Proprietary with the Securities and
 Exchange Commission ("SEC"). All documents are available through the SEC's
 Electronic Data Gathering Analysis and Retrieval System (EDGAR) at or from Nano-Proprietary's web site listed below.
 Nano-Proprietary hereby disclaims any obligation to publicly update the
 information provided above, including forward-looking statements, to reflect
 subsequent events or circumstances.
     About Nano-Proprietary, Inc.
     Nano-Proprietary, Inc. is a holding company consisting of two wholly-owned
 operating subsidiaries. Applied Nanotech, Inc. is a premier research and
 commercialization organization dedicated to developing applications for
 nanotechnology with an extremely strong position in the field of electron
 emission applications from carbon film/nanotubes. Electronic Billboard
 Technology, Inc. (EBT) possesses technology related to electronic digitized
 sign technology. Nano-Proprietary's website is .
      COMPANY CONTACT                          MEDIA CONTACT
      Doug Baker                               Patti D. Hill
      Chief Financial Officer                  BlabberMouth Public Relations
      Nano-Proprietary, Inc.                   512.218.0401

SOURCE Nano-Proprietary, Inc.

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