Two FTUs are about the same as 1g of topical steroid. Therefore, in order to treat an area of skin the size of eight adult hands, one would need four FTUs for each application.
US Patent Issued to Silverbrook Research on Feb. 1 for "Finger Tip Data Reading Device" (Australian Inventors)
Feb 09, 2011; ALEXANDRIA, Va., Feb. 9 -- United States Patent no. 7,878,408, issued on Feb. 1, was assigned to Silverbrook Research Pty Ltd....