The unifying thread of her work is not a specific technical discipline but a specific approach: identify a real problem that real people experience, design a solution that addresses it specifically and practically, and file for the patent protection that is every American inventor’s legal right.

The Patent System and the Race Problem

Understanding Mary Kenner’s story requires understanding the broader context of Black American inventors and the patent system, because her individual experience was both distinctive and representative.

The United States patent system, established by the Constitution and developed through legislation over the following centuries, was designed on principles of openness: any person who developed a genuinely novel and useful invention was entitled to patent protection regardless of their identity.

The formal structure of the patent system was never explicitly racially discriminatory in the way that many other American institutions were; the Patent Office did not bar Black inventors from filing applications.