The legendary amplifier designer who was known for many unique engineering designs that to list a few
Tube-amp design and transformer winding.
In the early 70's at Denon, the C1000 preamp, 180W solid state M4000 and M6000 power amplifiers, and the MQ-3600 tube power amplifier.
Modifications of ATR and Studer R-R machines amongst many other achievements.
https://www.youtube.com/watch?v=pO9Y6Z7scTo