Family heirlooms are hard to part with, especially if they've been passed down for generations. On the other hand, some heirlooms are difficult to maintain and may be worth letting go — particularly ...

Whether you have inherited an old sewing machine or picked one up at the local thrift shop, it's totally normal to be curious about its value. Antique Singer sewing machine values are determined by ...

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 ...