This is one example of many castles in the medieval time period. There were many parts to a castle. But, it depended on how the castle was built to recognize parts that did and did not appear on the castle built.
Like spray paint, these markers give off volatile organic compounds. Some of the most recently made permanent markers are made from recycled plastic.[citation needed] The permanent marker was invented in 1952 by Sidney Rosenthal.
More history and information on: pencils, pens, erasers, pencils, pencil sharpeners, ballpoint pens, and more. No man was more foolish when he had not a pen in his hand, or more wise when he had - Samuel Johnson. A Hungarian journalist named Laszlo Biro invented the first ballpoint pen in 1938.Biro had noticed that the type of ink used in newspaper printing dried quickly, leaving the paper dry and smudge-free.his principle of the ballpoint pen actually dates back to an 1888 patent owned by John J. Loud for a product to mark leather. However, this patent was commercially unexploited. Laszlo Biro first patented his pen in 1938, and applied for a fresh patent in Argentina on June 10, 1943.