Kevin, the right answer to your question, is that they are yours. You own them,so logic says that they're yours. All of the Olson blades that I've used and are shaped like these, were very nice blades to use. The only reason I stopped using them, was the expense. Plus, I had started selling Flying Dutchman at the time. The Olson blades cut nice and leave a nice edge, they lasted a very long time, and I hardly ever had any of them break. So, maybe these aren't Olsen blades, considering how you described them.
Len