The lithographic process was invented in the late eighteenth century by the German writer Aloys Senefelder.

VOA: special.2009.09.02

New equipment was invented for digging deep wells.

VOA: special.2010.04.15

That was the year "barbed wire" was invented.

VOA: special.2010.04.15

New farm equipment was invented.

VOA: special.2010.04.15

Before refrigerators were invented, the next best thing was an ice box.

VOA: special.2009.11.30