Comment by EvanAnderson

I feel like the company might have been Yellow Springs Instrument (YSI, now a division of Xylem).

The dissolved oxygen sensor (the Clark electrode) was invented by Dr. Lee Clark at Antioch University (Yellow Springs, OH) and commercialized by YSI in the 1960s. A friend of mine worked at YSI from the late 60s thru the 80s on biosensors (glucose and lactic acid, using the Clark electrode as the basis) and worked directly with Dr. Clark.

Carl Feynman was born in 1962, according to what I'm reading, so if he was 14 that would have put this story in the time period early in the commercialization of these sensors.

Some good background:

https://derangedphysiology.com/main/cicm-primary-exam/respir...

https://www.anaestheasier.com/the-clark-electrode/

I'll have to hit my friend up to see if he knows anything about this. I'm certain he'd get a kick out of reading this, if nothing else.