Levine’s Guide to Knives
(if you don’t have a copy I recommend you get one) has quite a bit about the origins of various knife patterns, including “utility/scout” knives. I couldn’t find a specific answer that said “this was the very first one”, so I doubt that anyone knows for sure or Levine would have said so.
What he does say in essence is “four-blade utilitarian multi-blades date back at least to the 18th century.” These originated as an effort to make less expensive versions of multi-blade horseman’s and sportsman’s knives. He mentions the six-blade utility knife with punch and corkscrew on the back, which originated in Europe (German, Bohemian, French, and Swiss) as being cheaper versions of the traditional horseman’s and sportsman’s knives, while “retaining the most important blade to Europeans, the corkscrew.”
The standard four-blade utility (scout) knives offered by American firms began to appear around 1900 as a cross between the American equal-end cattle knife and German and Swiss multi-bladed hunter’s and soldier’s knives. The corkscrew was not a big seller in America, as bottled wines weren’t in vogue at the time. The pattern was typically built on an equal-end cattle knife frame. “The standard utility knife is 3-5/8 inches long closed, and has two back springs and a bail, it has four blades: ordinarily a spear master blade, a punch, a can opener, and a screwdriver-caplifter.”
He goes on to say “What brought the four-blade utility knife widespread popularity in the United States was its designation in 1910 or 1911 as an official style of pocketknife for the Boy Scouts of America. Until 1922 New York Knife Company was the only firm authorized by the B.S.A. to make Official Boy Scout knives.” Because of the pattern’s popularity however, “most all of its rival pocketknife firms made unofficial
I don’t know if that helps answer your question of not.
I suppose it depends on whether you define a more-than-four-blade knife with a corkscrew as a “scout-pattern” knife. That seems to be a fairly broad and subjective definition.