Both of your knives have what is called a crest or federal style shield, which was the most common type in use here in 20th century America. EVERY company had one or more variations of it, and the differences are very subtle. So from a true ID we are looking for subtle clues.
The top knife is what we call a "regular jack" pattern, probably the most common pocketknife style of all time. Crest shield is short and indistinct. Wood handles tell us little. This knife could be any of many different American manufacturers, my ballpark time frame would be circa 1910-1940.
The lower knife is what we call a "serpentine jack" pattern and the crest shield is large and long. The handles appear to be a swirl celluloid. While also a standard pattern that was common among American manufacturers during the 20th century, with this knife you have a combination of features that might point you to the Imperial knife Co. of Providence, RI (mentioned above by relevantchair). A) Imperial often used a long crest shield like this with two 'scoops' from the top end, B) Imperial rarely used any material other than celluloid up into the 1950s, and C) Imperial made tons of this particular pattern, the serpentine jack. I wouldn't stake my life on it, but your lower knife was probably made by Imperial c.1920-1950.
