Tag: Gladys Geissman

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 […]

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