IDENTIFY THE INVENTORS (ITI) SERIES - FET INVENTORS

IDENTIFY THE INVENTORS (ITI) SERIES -  FET INVENTORS

ANSWER: 

THE FIGURE UPLOADED ON LAST DAY IS Julius Edgar Lilienfeld.

THE OTHER INVENTOR WHO GOT PATENT IS UPLOADED BELOW. 

Please also try to identify him also by clues given below. 

clues:

• An electrical engineer 

•  Ph.D in Molecular spectroscopy

•  Also inventor of  Heil tube

•  Also inventor of   Air motion transformer