Nano-Proprietary, Inc. Announces Improved Carbon Nanotube Based Biosensor

Austin, Texas – October 21, 2003 – Nano-Proprietary, Inc. (OTC BB: NNPP), through its subsidiary, Applied Nanotech, Inc. (ANI) today announced the successful demonstration of an improved biosensor using carbon nanotubes (CNTs). The new biosensor developed by ANI is based on the immobilization of biological enzymes onto carbon nanotubes, utilizing electropolymerization in conjunction with conducting polymers. The previous technologies implemented with other materials, such as mineral oils, to bind the biological enzyme to nanotubes did not yield sufficient sensitivity. ANI's biosensors utilizing multiwall carbon nanotubes (CNT) show sensitivities for hydrogen peroxide detection three times higher than equivalent competing biosensors.

ANI is in the process of implementing the new process for detection of liquids and gasses. Many harmful gasses such as carbon monoxide, sulfur dioxide, hydrogen sulfite, nitric oxide, hydrogen chloride, hydrogen cyanide and others; as well as liquids such as glucose, phenol, urea, cholesterol, penicillin, fructose, etc. can be detected using ANI's newly-developed sensor technology.

"Our improved biosensor is a versatile, low cost, easy-to-manufacture carbon nantotube-based sensor with many practical applications," said Dr. Zvi Yaniv, CEO of Applied Nanotech, Inc. "In the ecological field, for example, it can be used to monitor impurities in air and water. In the health-care realm, it can enable self-monitoring of glucose levels in blood. The security and defense industries can use it for chemical and biological warfare applications."

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 is included in Nano-Proprietary's annual report on Form 10-KSB for the fiscal year ended December 31, 2002, 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 www.sec.gov 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 development 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 www.nano-proprietary.com.

Company Contact:
Doug Baker
Applied Nanotech Holdings, Inc.
248.391.0612
dbaker(at)appliednanotech.net

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