when was the lastest writing materails invented?
That depends on what you call writing materials. If you are including Blackberries and the like, then very recently. If you are talking about pens and paper, then you should look up BIC.
what is a BIC?
http://www.bicworld.com/index_en.asp
You might also investigate the Gutenberg printing press, the history of computers, the invention of papyrus, and others.
Use http://www.google.com
http://www.fundinguniverse.com/company-histories/BIC-Corporation-Company-History.html
The invention of writing materials is a complex and continuous process throughout history, but the latest significant development in writing materials was the development of the digital stylus and tablet technology. Digital stylus and tablet systems have emerged as popular tools among artists, writers, and note-takers. They offer a seamless transition from traditional paper and pen, allowing users to write or draw directly on a digital surface.
To find the exact date of when the latest writing materials were invented, we can perform an online search using keywords such as "latest developments in writing materials" or "recent advancements in writing tools." This will provide the most up-to-date information on the topic, as innovations and developments in writing materials are ongoing.