It was a surprise to me that we knew about this back in 2000 following a patent application by Miller, Klepfer, Reid and Jones Jan 28 2000 US patent 6372224.
Here are just a few of the patents:
If you are as concerned as I am, I encourage you to share this video, tag your friends, family, and neighbours, encourage them to examine the narrative versus the emerging evidence and put an end to these lockdowns.