Did it ever happen to you that you had a bag filled with GaAsfets and you didnot know of which type these were, or maybe you use Fets from old LNB or surplus, here is (maybe) the solution for your problems......
Fujitsu The Fujitsu fets have a marking on the gate
|Mark / Letter
I received an email which I include below FYI (Thanks David!)
I was looking some informations about GaAs Fet markings and I find differences between your NEC chart and my databook. Perhaps you're right or there is a unknown reason for such differences. D=NE32584C K=NE42484C L=NE32984D T=NE32484A W=NE42484A C,V,Y seems to be wrong too but I have not the PDF file for them at this moment... 73's from F1URI, David