You are unknowingly asking for a lot more than is really known. Other than the very common and wide spread proliferation of imported trade knives, there are but few examples of other knives that can be positively documented to that time. I can give you a few presently accepted basics of what to consider, and others here can add to what I may neglect.
Guards are most often found only on daggers. The use of brass on knives is rare to non-existent, except in the case of broken sword knives. Retaining pins of other metals than iron, rare to non-existent. Wood, cow horn, and bone most common grip material. Antler grips apparently rare, but do seem to have been used on occasion. Blades of thinner stock than we commonly think appropriate today. Folding knife blades turn up commonly in archaeological digs. Ricassos on blades other than broken swords would be rare. American smith made blades commonly slightly convex in cross section, but probably not always. Do some research on 18th c. knives, and you will find but few that are iron clad documentable. We know by the vast amount of relic blades found in eastern regions, that the most common knife was a trade knife. Scalpers and butchers. They were cheap and usually available somewhere in most parts of the country.