With 110 inventions and 49 patents under her belt, which inventor said, "I invent, because I cannot help it."

It's unsurprising that Beulah Louise Henry also earned the "Lady Edison" moniker. And unlike her prolific counterpart, Margaret Knight, she profited well from them. She applied for her first patent for the vacuum ice cream freezer while she was a college student. From there, she worked with companies to sell her inventions and also tried to improve upon existing inventions. Way to engineer!

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