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Odd question: can anyone help me find the original patents for kernmantle and/or dynamic ropes from back in the 50s and 60s? Even just the #s. I figured that they wouldn't be hard to track down, but, once again, I'm wrong. Any tips or thoughts or help?
Google patent search engine: patents.google.com/ lets you search by keywords and set date ranges.
Edelrid is often cited as first introducing the first kernmantle rope (1953) in Germany. I believe this is just in a climbing sense though. Kernmantle ropes certainly predate the 50s.