After all these years... we still see our name on products in the field. We were sheet metal manufacturers many moons ago, My father was quite the innovator.
I saw this on a roof the other day and it was one of his designs from about 1975 that we manufactured and sold to our retail distributors for many years.
After 45 years you really should repaint them. In any case they were used all over CA. I continue to run into flex duct with our "Young Wire Flex" logo on the jacket. I tip my hat to my Dad, Lester Young and applaud his many patents.