Designers -who's been around the longest ?

I was going to offer Thomas Edison, but @thecarpathian won this thread with the first reply. Cheers,
Spencer

I’ll clarify -when their career in design began. The (2) I mentioned are their current co.

Henry Kloss

Are you talking about electronics? All around? Bob Carver, still alive and still designing. James Martini (JBL & Altec) + James B. Lansing. I personally don't like Nelson Pass because he bought ALL the extra Sony V-FET transistors. People like me that own V-FET amps now have no replacement parts😒, but a good designer.

Any designer will do. Sorry to hear about the V-FETs. The bigger problem is what John Curl has been saying -HQ parts are not produced in good numbers anymore.

The exception are the new GaN-FETs-but these are output-only devices. MSB makes a terrific resistor-DAC but this is only one co.