Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Poker table
The card table arose around 1700 AD as card games became wildly popular in Europe. The manufacture of card tables as fine home furniture lasted to the middle of the 1800s. Card tables made in this era often had a folding top, which enabled them to serve as pier tables, console tables, or end tables when not in use. Styles ranged from simple to elaborate, with higher-end card tables featuring inlaid wood or stone, extensive delicate carvings, and expensive veneers. Some even had indentations carved into the playing surface to hold playing tokens, and slots around the rim which served as candle-holders. Semicircular (or "D" or "half-round") tables in diameter (when opened) were the most popular card table in both North America and Europe.