Blades from stone to steel.

French & Indian War era Penny knives.

Many good images at this site.

http://ehcnc.org/decorative-arts/historic-trades/blades-in-va-and-nc/

PLEASE NOTE: Patch knives are mentioned in this article, but to date I have found no evidence that patch knives per se existed. I think it more likely that these knives were utility knives, & some may have been used for cutting patch material.
Keith.