The expiration, August 14, of two of what have heretofore been considered the "controlling " patents of the McKay Sewing ...

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 ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. David W. Clark Sewing machine Patent ...