One significant event in Black history related to medical patents is the story of Sarah Breedlove, also known as Madam C.J. Walker. Madam C.J. Walker was an African American entrepreneur and philanthropist who became one of the first self-made female millionaires in the United States. She is best known for developing and marketing a line of beauty and hair care products for Black women.

In 1905, Madam C.J. Walker applied for and received a patent for her hair care formula, which she called the "Madam Walker's Wonderful Hair Grower." This patent not only allowed her to protect her intellectual property but also gave her the legal rights to profit from her invention. The success of her products and her savvy marketing strategies helped her build a successful business empire that catered to the beauty needs of Black women.

Madam C.J. Walker's innovative approach to hair care products and her entrepreneurial success paved the way for other Black inventors and entrepreneurs in the beauty and cosmetics industry. Her story is a testament to the power of ingenuity, determination, and resilience in overcoming societal barriers and achieving success in business.