I disagree with almost everything you and Stacy wrote .I will stay just on this sentence .........After a few years of practice, making knives every week or day then you can actually design knives and make themWhat Stacy said is basically the hard truth, if you really wan't to be a knife designer, then you have to put years into knife making first.
Nobody is going to want a knife designed by somebody who isn't a professional knife maker.
Get into knife making, you can make a basic heat treating forge, buy some files and good torch. For around $100 you can rig up the bare basics and start from there.
After a few years of practice, making knives every week or day then you can actually design knives and make them. You need an inventory, or portfolio so to speak, not just drawings on paper. You don't want to approach a serious company with some drawings on paper and ideas in your head. Approach them with a catalogue and bag full of knives you have made. You will be easily dismissed if you don't have anything to back up your ideas with. Now it's harder to dismiss somebody with a shop full of finished knives for sale.
Then even if nobody wants your knife designs, you just made them all yourself, so you succeeded anyway and are now a knife maker and designer for yourself.
Instead of of wasting unnecessarily several years of practice he can visit a well-equipped knife shop and inspect many knives carefully.I can bet with you that he will learn more in that way then to spend few years in shop......
Reading some comments here it seems to me that you are trying to rediscover hot water . Some of you make it as it is rocket science to make a good usable knife.
There are a lot of good knives here from unknown masters, there are of course some not so good ones. I'm talking about the design, not the quality of execution and finish.