For much of the nineteenth century, inventors submitted a model with their patent application to the United States Patent Office. The National Museum of American History’s patent model collection ...

The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Riley Papp and Ninwa ...

The first thing you notice when you arrive in Lawrence, Massachusetts, are the mills — picturesque five- and six-story red brick buildings that stretch into the distance along the Merrimack River. A ...