Patent #D490905 issued on June 1, 2004 for a Pig Swimming Pool.
The ornamental design for a pig swimming pool.

Patent #276,586 – Toy

It has always been tradition to light up the Christmas tree with some kind of lights. Despite the danger of fire, candles had been used to light up the Christmas tree. In 1882, Edward Johnson demonstrated a new way to light up the tree. Johnson created the first string of electric Christmas lights. He hand [...]

Patent #81,437 was issued to Franz Vester on August 25, 1868 for an Improved Burial Case.
This coffin was designed so that a person who was buried alive could escape. Vester’s invention included a square tube that extended above the gravesite allowing air inside the coffin. This tube had a ladder and a way for aboveground [...]