Unfortunately for American rocketry, Goddard's approach to revealing his technology appears patterned on the Wright Bros. Most of Goddard's patents were written to reveal little and protect all. Some however, dealing with concepts many years from any possible application (his turbo-rocket airplane, for example) were interesting and even made the covers of 'thirties Popular Science and Modern Mechanics magazines. While Charles Lindbergh succeeded in bringing in financial support, Goddard's actual rocket flight demonstrations were largely disappointing. All this is not to distract from Goddard's vision or technical competence- he needed a support staff of a few competent mechanical engineers, machinists and maybe consultation with someone who understood a Nyquist diagram.
What was really lacking was some spectacular achievement like Dr Jim Doolittle flying to an aircraft speed (or altitude) record boosted by a Goddard rocket, or a glitch free flight by one of his rockets to a significant altitude, which sadly never happened.
Dynasoar
That's in the nature of rocket development as no one really knew what they were doing and how to achieve it, lots of trial and error and all was very costly. But if you can sell your rocket development to the government it goes very fast, here's the German program:
Aggregat 1: 1933, 1.4m long, 3kn thrust, no successful flight
Aggregat 2: 1934, 1.6m long, 3kn thrust, 3.5 km high flight
Aggregat 3: 1935, 6.7m long, 15kn thrust, 18 km high flight
Aggregat 5 (it comes before 4): 1938, 5,8m long, 15kn thrust, 12 km high flight
Aggregat 4: 1942, 14m long, 265kn thrust, 206 km high flight
Until A3 it's not really impressive, hobbyists do better today, but then it snowballed very fast, and after the war continued in the USSR and USA where they went from launching copy A-4s to better domestic designs capable of true space launches in just a few years.