Niko,
I looked into getting a patent for a few things and found out the following.
- 3-5 years for approval if it happens
- $5-8K (The lower end if you do most of the work yourself)
- A 20% difference in product design is all that's required to "get around" a patent legally (and that really isn't much).
A friend in the nylon biz found out that for design, you may be better off with a trademark and even then, it's a bit "mushy".
Patents and trademarks are only good if you have the money and time to prosecute potential violators, and an international one (of course more money) is the only way to have a chance of stopping the rip-off artists overseas....again, only if you have 10's of thousands of dollars to back it up...
Mind you, all this comes into play only if it's truly original. I've been in the Kydex biz since the late 90's (working for Blade Tech Ind) and for the last 9 on my own. Not a whole lot hasn't been tried/tested. I found that it's far more cost effective to make your product distinctive and execute it well.
Even showing your ideas to folks carries risk. I have used non-disclosure/non-compete agreements (from both sides of the table) and again, those are really only worth the money you are willing to spend backing them up. They work great if the folks you are dealing with are essentially honest to begin with and the knife industry is (I know someone's gonna get mad)....not the safest place to play if you want to deal with the "big boys".
I know this all sounds kind of negative, but if you really look into it, protecting "intellectual property" is quite difficult, time consuming and expensive because of the number of ways it can be compromised.
The other side of the coin here though flies in the face of a good friend's advice "That's a super idea...don't show it to anyone!" If you don't get the idea out, it'll never be of any worth to you at all....
Best of luck!