Thank you for correcting my cd133 to the cd160. I appreciate it. I gotta make sure I rewrite it in my book.Sorry - its a CD 160 "baby signal." A CD 133 has no inner skirt. A nice find though!
The patent date is for the drip points on the bottom that were supposed to help water drain off of the insulator surface faster. Scientific testing has proven it did not work. But it was a good marketing move.