
@ruawhitepaw
Some sources I found:
Sates that in 1959, the "cold weld concept was applied to a new invention called the 'insulation displacement contact' or IDC," developed by Edward Leach and Evert Levin at Minnesota Mining and Manufacturing (3M).
https://hackaday.com/2017/03/07/punching-it-down-insulation-displacement-connectors/
Mentions the patent issued in 1961.
Mentions a vague "50 years ago".