Shok:
It still could have been out in the early 60's.
Yes, but not my roll. I read the patent number from the label.
I did finally get the patent to come up, and I read it. There are references to papers from the late 1930s.
It would seem Sidney's innovation was no more than supplying the poly film with the adhesive coating on it, once you cut through all the references and bull.
The heat shrink film and the glue were already available, but you had to apply them separately.
Bill.