The original inventor of the mechanical pencil is up for debate. There are documented references to a lead-holding pencil as early as 1565, and the earliest known version of what is now considered the modern mechanical p... More »

The Pilot Dr. Grip Center of Gravity, made with a grip so good that it won an award from the Arthritis Foundation, the Lamy 2000, with its brushed fiberglass-and-stainless steel body, the Rotring 800, with its hexagonal ... More »

www.reference.com Business & Finance Business Resources Office Supplies

Although the exact inventor of the pencil is unknown, Conrad Gesner is often credited with the invention. In 1565, Gesner was the first to document the use of graphite placed in a wooden shaft, which was the predecessor ... More »

www.reference.com History Inventions

Although the exact inventor of the pencil is unknown, Conrad Gesner is often credited with the invention. In 1565, Gesner was the first to document the use of graphite placed in a wooden shaft, which was the predecessor ... More »

www.reference.com History Inventions

It is believed that the first mechanical clock was invented in 723 or 725 A.D. by Chinese mathematician and monk Yi Xing, also spelled I Hsing. Rudimentary clocks existed prior to that in Europe, but they did not have th... More »

There is much debate about who invented the DVD player and even when it was first invented, since the technology is derived from multiple sources, including several individuals and companies. When the acronym was first c... More »

Martin Ohm is considered to be the golden ratio inventor, according to MathWorld, as he first used the term "golden section" in 1835. The golden ratio is a value such that x / 1 = 1 / (1 - x). More »

www.reference.com History Inventions