![USPTO on X: "#OTD: The Patent Office fire of 1877 was the second fire in the agency's history. Approximately 80,000 models and 600,000 copy drawings were destroyed. See more patent history at USPTO on X: "#OTD: The Patent Office fire of 1877 was the second fire in the agency's history. Approximately 80,000 models and 600,000 copy drawings were destroyed. See more patent history at](https://pbs.twimg.com/media/Dn4NKfqV4AIp_mp.jpg)
USPTO on X: "#OTD: The Patent Office fire of 1877 was the second fire in the agency's history. Approximately 80,000 models and 600,000 copy drawings were destroyed. See more patent history at
![A Temple of the Useful Arts: Highlights from the History of the Patent Office Building – Smithsonian Libraries and Archives / Unbound A Temple of the Useful Arts: Highlights from the History of the Patent Office Building – Smithsonian Libraries and Archives / Unbound](https://blog.library.si.edu/wp-content/uploads/2018/04/1846.jpg)
A Temple of the Useful Arts: Highlights from the History of the Patent Office Building – Smithsonian Libraries and Archives / Unbound
![The sky-lit ornate interior of the old U.S. Patent Office in... | Old things, Ornate, Us patent office The sky-lit ornate interior of the old U.S. Patent Office in... | Old things, Ornate, Us patent office](https://i.pinimg.com/originals/c2/1c/1a/c21c1a494621792a327fe93aa9baf881.jpg)