Snagged this Lufkin No. 926 "Mezurall" at the flea this morning.
It has two patents (1,964,280 and 1.973,843) on the case and a third (1,828,401) on the tape itself.
That first patent on the case is the Witchger patent (granted Jun 26, 1934), and the same patent on my "Wizard", as shown and reported in post #118 on page 6. It's for the winding mechanism inside the case.
The second patent on the case is Buck, assigned to Lufkin, granted Sep 18, 1934, for the little stopper and how it's attached on the end of the tape.
The patent on the tape I have not seen before. It's Farrand, assigned to Lufkin, granted Oct 20, 1931, for the steel tape itself, particularly the spring steel its made of, the resiliency of the concave-convex shape, and the illuminating metallic plating.