Ty, that roundup is not complete without a picture of Briggs and Stratton's first product, the Motor Wheel, in 1919:
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That picture is from the cover of the B&S Repairman's Handbook. It is shown fitted to the Smith Flyer, a crude buggy. Here is the whole Flyer:
[Linked Image]
(Flyer image from wikipedia).

Briggs bought the design of the Motor Wheel, a 1910 British invention, revised it, and made them for several years before selling the design in 1925. By then they were making other engines of their own design.