When aviation was still in its early stages, Alberto Santos Dumont took an unusual approach to technological innovation. Rather than restricting access to one of his aircraft designs, he made the construction plans for the Demoiselle publicly available.
Developed between 1907 and 1909, the aircraft was compact, lightweight, and relatively straightforward to build by the standards of its time. In 1910, detailed drawings were published in Popular Mechanics, allowing interested readers to study the specifications and reproduce the design.
The initiative helped spread aeronautical knowledge and enabled different manufacturers to build the aircraft. It also offers a historical perspective on a question that remains relevant to companies, researchers, and inventors: how can innovation be protected while knowledge is made more widely available?
The Demoiselle: an innovation open to reproduction
The Demoiselle, also known as La Demoiselle, was one of Santos Dumont’s last aircraft. Its first model flew in 1907, and subsequent versions improved through 1909.
The aircraft stood out for its small dimensions and lightweight structure. Its design evolved through several versions, reflecting the experimentation and technical refinement that characterized aeronautical development at the time.
In 1910, Santos Dumont made detailed plans for the aircraft publicly available. This gave others access to the technical information needed to build their own units, without relying exclusively on the inventor.
According to records from the Brazilian Air Force’s Aerospace Museum, some factories began producing the Demoiselle in 1909, and they built more than 40 units. The aircraft is often cited as one of the earliest examples of a mass-produced airplane.
Santos Dumont’s decision to share the design reflected his belief that his inventions should contribute to aviation’s development and benefit society.
Knowledge sharing and technological development
The Demoiselle’s history illustrates how access to technical information can help spread a technology.
By making the drawings available, Santos Dumont allowed other builders to study his solutions, adapt the design, and explore its potential. The initiative helped reduce an important barrier to reproducing the aircraft: access to the knowledge required to build it.
This approach has parallels with modern open innovation practices, in which companies, universities and researchers share knowledge, technologies or resources to accelerate the development of new solutions.
Today, such collaboration can take place through scientific publications, open licenses, collaborative projects, technology transfer and research partnerships.
Although the mechanisms differ, the underlying principle is similar: letting knowledge circulate can expand opportunities for experimentation and enable others to build new solutions on existing technologies.
Patents and innovation: protect or share?
Santos Dumont’s story also illustrates a strategic choice faced by inventors and companies: whether to protect an invention through intellectual property rights or make certain information available for broader use.
Patents can grant their owners a temporary exclusive right to an invention, provided they meet the applicable legal requirements. In return, the system requires the disclosure of technical information about the protected solution, contributing to the dissemination of technological knowledge.
A patent therefore does not mean that knowledge will remain permanently inaccessible. The patent system establishes conditions for protecting and disclosing inventions, as well as territorial and time limits on the rights granted.
Other approaches allow structured sharing of technologies, including licenses that authorize third parties to use an invention under agreed conditions.
Decisions about whether to protect, license, or openly share a technology should take several factors into account:
- Commercial objectives: Does the company intend to commercialize the invention itself, license its use, or encourage wider market adoption?
- Competitive advantage: Is exclusivity important for recovering research and development investments or establishing a market position?
- Potential for dissemination: Could sharing encourage adoption, collaboration and the development of complementary solutions?
- Business model: Does value depend on exclusive control of the technology or on services, complementary products, partnerships and network effects?
There is no single answer to these questions. The most appropriate strategy depends on the nature of the innovation, the resources invested, and the developer’s long-term objectives.
What can companies and researchers learn from the Demoiselle?
The Demoiselle shows that innovation management involves more than deciding whether to patent an invention. It also requires decisions about how knowledge will be made available, commercialized, and incorporated into new solutions.
For companies and research institutions, these considerations should form part of their intellectual property strategy from the early stages of technological development.
In some contexts, exclusivity may be essential to support investment and create licensing opportunities. In others, sharing can increase technology adoption, encourage partnerships and strengthen an innovation ecosystem.
It is also important to distinguish the disclosure of technical information from the grant of rights to use it. Publishing a design, making documentation available or sharing research findings does not, by itself, establish every legal condition governing third-party use. Those conditions depend on the rights involved and the applicable terms.
Santos Dumont’s historical experience does not provide a universal formula for intellectual property management, but it demonstrates how different choices can influence a technology’s development.
Innovation also depends on strategic choices
More than a century after the Demoiselle plans were published, the debate over protecting and sharing knowledge remains relevant in fields such as artificial intelligence, software, biotechnology and aerospace.
Companies developing new technologies need to consider not only how to protect their creations but also how to turn that knowledge into economic, scientific or social value.
Intellectual property provides tools for structuring these decisions. Its role extends beyond preventing copying: it can also support licensing, collaboration, technology transfer and different models of commercial exploitation.
The Demoiselle’s legacy reinforces the idea that innovation and sharing are not necessarily opposing goals. Understanding when to protect, when to license, and when to share is part of the strategy for turning knowledge into technological progress.
