Harald Scan is able to determine Major and Minor device class of device, as well as attempt to resolve the device's MAC address to the largest known Bluetooth MAC address Vendor list.

If you are running Harald Scan and see a entry with 'Unknown' in the vendor column please email me the file which is created in the same directory with the first 8 characters of the MAC address.
Feature Requests If you would like to see a feature added the Harald Scan, Fill in a Issue report and set the label as Type-Enhancement