PC: National Inventors Hall of Fame
Johnson’s hand-cranked freezer patented in 1843. Henry went on to develop more than 100 inventions and received 49 United States patents during her lifetime. Largely self-educated, Henry was inducted into the National Inventors Hall of Fame in 2006 for her inventive achievements.
In 1912, American inventor Beulah Louise Henry patented a vacuum-sealed ice cream freezer, marking the beginning of a career that would earn her the nickname “Lady Edison”. Her work included innovations in sewing machines, typewriters, umbrellas, dolls and other everyday products.
Her design improved on earlier ice cream-making technology, including Nancy M.
How did Beulah Louise Henry earn 49 US patents
Henry’s patent, numbered 1,037,762, was included in the USPTO lesson plan alongside Johnson’s earlier patent to illustrate the development of ice cream-freezing technology. The USPTO’s educational resource credits Henry with 49 United States patents and more than 100 inventions.
Nancy M, according to the USPTO lesson plan. Johnson patented an “artificial freezer” in 1843. The USPTO explains that Henry’s freezer could be operated “by a crank or by motor power”. She developed a wide range of inventions, including a typographical device called the “protograph”, which produced an original document and four typewritten copies without carbon paper, according to the National Inventors Hall of Fame.
Johnson’s design used a hand crank, and the invention helped make ice cream more widely available. Henry subsequently developed an ice cream freezer that improved on Johnson’s design and other freezers that had been patented before hers. Henry’s work extended well beyond ice cream-making equipment. Her other inventions included a lockstitch sewing machine without a bobbin, an umbrella with interchangeable snap-on covers, a children’s clock designed to teach the time and a doll whose eyes changed colour at the touch of a button. It also records that she founded two companies and worked as a consultant to other businesses. Her inventions covered sewing machines, typewriters, cash registers, umbrellas, dolls and toys. These examples demonstrate the breadth of her work across household products, office equipment and mechanical devices.
Henry’s invention built on earlier developments in ice cream-making equipment. The educational resource describes this as an improvement on earlier hand-cranked models, which required users to turn the mechanism manually.
Why was Beulah Louise Henry a pioneer among women inventors
The USPTO lesson plan explains that only 32 patents had been issued to women by 1850. It also records that women received ten patents annually between 1855 and 1865, while men received 3,767. Henry, born in 1887, secured 49 United States patents during her lifetime, becoming a recognised figure in the history of women’s contributions to invention. The Hall of Fame inducted her in 2006 in recognition of her inventive achievements.
Her first patented invention, the vacuum-sealed ice cream freezer of 1912, remains an important starting point in the documented history of a career that encompassed more than 100 inventions and earned her the nickname “Lady Edison”. Henry’s inventive career was particularly notable during a period when women inventors received comparatively little recognition. Henry was largely self-educated and described her ability to visualise inventions before attempting to build them. You use AI every day. Now get your AI Quotient. Take the AIQ test.