Hi Brian
I remember seeing a write up of these in Write up in Popular Mechanics or Science as a kid. Will search the back issues on line and see if I can find the story.
Sure would not want to be the lab rat that they tell to walk across a minefield to test them. Concept is sound but how would you be sure you had actually reduced the PSI contact force enough not to activate the trigger?
Cheers Phil
Findings so far: How about the patent
https://www.google.com/patents/US6751892
Popular Mechanic search yielded 0 results, but then again the archive yielded 0 results for term "Jeep" so something is not working.
Search on Minefield Shoe yields a lot of info -
https://www.google.com/search?q=snow...Minefield+shoe
Have fun reading, still would not want to be the person to test this on live mines.