JMAR to Present at The 2005 Stephens, Inc. Nanotechnology Investors Conference.

SAN DIEGO -- Ronald A. Walrod, President & CEO of JMAR Technologies, Inc. (Nasdaq: JMAR) is scheduled to present at the 2005 Stephens, Inc. Nanotechnology Investors Conference on Tuesday, April 5, 2005 at 3:30 PM (PST) at The Ritz-Carlton Hotel in Pasadena, California. JMAR is one of more than 25 private and public nanotechnology companies scheduled to present at the conference.

Members of the financial and investment community, the media and other interested parties can hear a live audio webcast of JMAR's presentation by accessing the link on JMAR's corporate website, www.jmar.com. The presentation will be archived for 90 days following the conference.

About JMAR

JMAR Technologies, Inc. is a leading innovator in the development of laser-based equipment for imaging, analysis and fabrication at the nano-scale. The Company is leveraging over a decade of laser and photonics research to develop a diverse portfolio of products with commercial applications in rapidly growing industries while continuing to carry out research and development for the U.S. Defense Advanced Research Projects Agency (DARPA) and support for the U.S. Government's Defense Microelectronics Activity (DMEA) semiconductor fabrication facility. JMAR is targeting the nanotech, bioscience and semiconductor industries with its Britelight(TM) Laser; X-ray Light Source; Compact X-ray Microscope - for 3D visualization of single cells and polymers- and its X-ray Nano Probe - enabling interaction, analysis and materials modification at the nano-scale. JMAR also develops, manufactures and markets its BioSentry(TM) microorganism early warning system and maintains a strategic alliance for the development of the READ chemical sensor for homeland security, environmental and utility infrastructure industries.