Samuel Mulliken received four patents in 1791. The Philadelphian was granted patents for:
- a machine to thresh grain and corn – Patent X7
- a device to break hemp – Patent X8
- a strategy to cut and polish marble – Patent X9
- a device to raise a nap on cloth – Patent X10
These patents were the last of the first ten patents issued in the United States. Unfortunately, a fire in the temporary building housing early patents destroyed all the early patents, so Mulliken’s documentation has been lost.