Sonora Medical Systems, Inc. subsidiary of Misonix, Inc., a developer of ultrasonic medical device technology for the treatment of cancer and other healthcare purposes, has received the first of three patents filed for its FirstCall 2000 ultrasound probe-testing device. The patent enforces the FirstCall device's unique process for testing ultrasound probes on site without requiring the ultrasonic system to be in operation.

The Director of the United States Patent and Trademark Office awarded US Patent No. 6,920,776 to Sonora Medical Systems. Commenting on the patent award, G. Wayne Moore, President and Chief Executive Officer of Sonora, said, "This patent is especially important to Sonora as it is the first patent awarded to our young company. Moreover, it provides intellectual property protection for our unique and highly useful device."

In July 2005, the FirstCall 2000 device was featured during three ultrasound quality assurance presentations given at the American Association of Physicists in Medicine (AAPM) meeting in Seattle.