Model designations:

Model J - no magneto, no rudder, 2 hp

Model K - magneto, no rudder, 2 hp

Model L - rudder, no magneto, 2 hp

Model M - magneto and rudder, 2 hp

Model N - magneto and rudder, 3 1/2 hp

There were three rudder styles. The curviest as seen in the 1913 is earliest.

Examples:

If the information below is correct, Louis E. Vogel, to whom the patent was granted, was the secretary and treasurer of the company in 1913, and had become the president by early 1914.
To download the PDF of the patent CLICK HERE.