Psychemedics Awarded Patent Fundamental To Hair Analysis Drug Testing - PR Newswire - sacbee.com/PRNewswire/ -- Psychemedics Corporation (NASDAQ: PMD) , hair testing pioneer and global leader for 25 years, announced today that the United States Patent Office issued a seventh patent, US No. 8,084,215, to the company. This patent focuses on liquefying hair and releasing drugs trapped in the hair without destroying the drugs. The new patented method can be used with a broad range of immunoassay screen techniques, mass spectrometry methods, and chromatographic procedures.Â