This Day, That Year – March 9

Nicolaus Copernicus recorded the first astronomical observation at Bologna on this day in 1497.

Did you know that:

• Charles Graham of New York was granted the first patent for artificial teeth on this day in 1822
• Albert Potts of Philadelphia patented a street mailbox on this day in 1858
• Gladys Geissmann received a patent for a garment for infants on this day in 1954