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This collection contains 36 incoming letters that Thomas P. Jones received while working as a patent examiner and patent solicitor for the United States Patent Office in the early 19th century, as well as 1 letter he wrote and 2 receipts. The letters concern patents or patent applications, and several include technical drawings and explanatory information about the inventions.

This collection contains 36 incoming letters that Thomas P. Jones received while working as a patent examiner and patent solicitor for the United States Patent Office, as well as 1 letter he wrote and 2 receipts. The letters concern patents or patent applications, and several include technical drawings and explanatory information about the inventions.

The correspondence includes letters about pending applications and changes to recently granted patents, as well as other official business.

• A machine for making nets, by George M. Gibbes
• A method for using paddlewheels below water (illustrated), by George M. Gibbes
• A method for paving streets (illustrated), by Antoine Würmser and Alphonse Minard
• A method to regulate the supply of water from pumps to steam engine boilers (illustrated), by John Cochrane
• An "endless chain" (illustrated), by George Merrick
• An invention to free locomotives from the danger of fires caused by sparks, by John S. Lafitte

Mahlon Gregg included an updated technical drawing for an unidentified invention. Other authors commented on the state of their applications and other aspects of the official patenting process. Thomas P. Jones wrote a letter to J. Eckstein & Company about the proper attribution for one of their patents, and wrote a receipt for an item from the American Art Union, later returned with a note from the recipient. Two receipts are addressed to Thomas P. Jones for the cost of transferring several patents and for his membership in the American Art Union.