#662 1917 · Manufacturers Aircraft Association (U.S. aircraft industry, government-brokered) · Aerospace / intellectual property
The U.S. government ended a patent war grounding its own air force by forcing rivals into one shared patent pool
the problem
Patent lawsuits between rival aircraft makers were freezing wartime U.S. aircraft production
background
The Wright brothers held a broad U.S. patent covering the basic principle of powered, controllable flight, and beginning in 1909 they and their company sued Glenn Curtiss and other American manufacturers who had built aircraft using their own, independently engineered control systems, arguing the Wrights' patent covered the whole concept of flight control rather than their specific mechanism. Courts largely sided with the Wrights, and years of expensive, bitter litigation followed between 1909 and 1917, with each new manufacturer facing essentially the same lawsuit in turn.
By the time the United States entered World War I in 1917, the domestic aircraft industry the military urgently needed to scale up had spent nearly a decade fighting itself in court instead of building planes, and the legal fog over who could legally build what left manufacturers reluctant to invest in production the Wright patents might simply shut down. Waiting for the courts to resolve the underlying disputes case by case, in the Court of Claims or otherwise, was not a timeline a country at war could accept.
what everyone would do
Let the Wright-Curtiss patent litigation run its course through the courts, or have the government simply seize the disputed patents outright — one was far too slow for a country trying to build a wartime air force on a deadline, and the other would have destroyed the patent holders' incentive to cooperate at all.
what they saw
The dispute wasn't really about whether Curtiss had infringed the Wrights' patent — the courts had already ruled on that — it was about whether litigation was the only available mechanism for pricing the use of these patents. If every manufacturer paid a small, fixed royalty into a shared pool instead of relitigating who owed what to whom, the patent holders got paid on every airplane built industry-wide, and every manufacturer got the right to build immediately — turning an all-or-nothing legal fight into a flat transaction cost everyone could simply pay and move past.
the move
Under direct pressure from the U.S. government — including a recommendation from a committee involving Franklin D. Roosevelt, then Assistant Secretary of the Navy — the Wright and Curtiss interests and the rest of the American aircraft industry formed the Manufacturers Aircraft Association in July 1917: a cross-licensing pool that eventually covered nearly 200 aeronautical patents. Any member could build aircraft using any patent in the pool by paying a small, fixed royalty per airplane manufactured, instead of negotiating or litigating rights to each individual patent.
why it works
Requiring near-total industry membership meant no manufacturer could free-ride by staying outside the pool while competitors paid in, and government leverage over lucrative wartime military contracts supplied the pressure eight years of private litigation and negotiation had never been able to generate on its own. Because the royalty was small and fixed per aircraft rather than negotiated case by case, it removed the uncertainty that had made manufacturers reluctant to invest in production in the first place, and because most of the money still flowed to the original patent holders, the Wrights and Curtiss had no remaining reason to keep fighting an arrangement that was already paying them.
the payoff
The pool let American manufacturers build aircraft immediately without waiting for a single lawsuit to resolve, unlocking the wartime production ramp the government needed; most of the royalty income flowed to the Wright and Curtiss patent holders until their patents expired, giving them a share of the industry's output without either side needing to keep suing the other. The arrangement drew immediate antitrust criticism as an "Air Trust," since access to military contracts effectively required membership, and it remained politically controversial through the 1920s even as it kept functioning.
where it breaks
It depends on an authority powerful enough to make near-universal membership effectively mandatory — without the government's leverage over military contracts, any manufacturer could simply decline to join and keep litigating independently, collapsing the pool back into the fragmented fight it was built to end. And because the pool grouped strong and weak patents together at one flat rate, it drew genuine antitrust concern as a cartel capable of excluding outsiders from an entire industry — a risk that has attached to every compulsory patent pool modeled on it since.
what came after
The Manufacturers Aircraft Association's cross-license pool became one of the earliest and most cited examples of a government-brokered patent pool used to break an innovation logjam during wartime, and it directly foreshadowed the compulsory pooling and cross-licensing structures still used today whenever an industry's own patent litigation threatens a goal — interoperability, crisis production — that no single company's court case can deliver fast enough.
references
- [1]The Patent War That Forced the US to Fly FrenchScintillation Research & Analytics, 2025scintillationresearch.com
- [2]04. Patent Wars — Flying Machines digital exhibitionLinda Hall Library, 2023lindahall.org