Bleepin Jeep winch invention

He said "patent pending." I wonder what that would cost him?
You can file for a patent pending for a few dollars which buys you a year to apply for the patent. After a year if you haven't applied it goes into the public domain. If he was actually serious about a patent and he isn't, it would not be in the public domain until the patent was approved. It will also never be patented. The cost to get one is prohibitive for low volume sales. Low volume is anything less than 100,000 to 1,000,000 units.
 
Cool idea.

But what’s stopping someone who knows how to splice and knot rope from just doing their own?
Not a thing. If and that's a big if, he does receive a patent, the only thing that buys him is the right to sue another manufacturer for a blatant enough copy that affects his company in a damaging manner. It will never get that far. It also does not prevent you from doing the same to your winch line and for as many of your buddies as you feel like.