The instruments have Jedson branding (engraved) but there might be more than one manufacturer.
King Musical Instruments (originally H.N. White Company) is listed in the Jedson 1930 as the manufacturer of Jedson Trombones, Trumpets, and Sousaphones.
The 1938 Dallas Catalog lists Dearman Standard Saxaphones. I will research Dearman. Either way, Jedson sold them.