But that evidence is not persuasive that the set of fonts that the author calls Gorton are actually derived from the lineage he presents (see the diagram captioned “The Gorton quasisuperfamily”), rather than from freehand lettering that would have been much more widely used at the time. Remember that the letterforms themselves could not qualify for legal protection in the United States. So none of the licensing agreements offered as evidence were needed to acquire the fonts. So we can conclude that they were executed to acquire the machines and the patents behind them for the purpose of introducing similar machines in a new market. The machine designs and methods of production were the hard part. The fonts were comparatively trivial to create and incorporate into a machine, whatever its design.
The author's comparison of the fonts actually argues against them being of the claimed lineage. Consider the many differences between the Taylor, Taylor & Hobson machine’s fonts and the Gorton machine’s fonts. If Gorton had a license to use the Hobson machine designs, which they did, they could have simply copied the TT&H fonts verbatim. But they clearly did not. Why not? I think it's likely that they simply preferred a different design, one closer to the letterforms that were more commonly used by draftsmen in the American market. In other words, the Gorton reference design was not the TT&H font design.
At least, that's my best guess based on the evidence presented.