 Shockley was upset about the device being credited to Brattain and Bardeen, who he felt had built it "behind his back" to take the glory.Matters became worse when Bell Labs lawyers found that some of Shockley's own writings on the transistor were close enough to those of an earlier 1925 patent by Julius Edgar Lilienfeld that they thought it best that his name be left off the patent application.Shockley was incensed, and decided to demonstrate who was the real brains of the operation.