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Everyone knows what Post-it notes are: They are those great little self-stick notepapers. Most people have Post-it Notes. Most people use them. Most people love them. But Post-it Notes were not a planned product. No one got the idea and then stayed up nights to invent it. A man named Spencer Silver was working in the 3M research laboratories in 1970 trying to find a strong adhesive. Silver developed a new adhesive, but it was even weaker than what 3M already manufactured. It stuck to objects, but could easily be lifted off. It was super weak instead of super strong. No one knew what to do with the stuff, but Silver didn't discard it. Then one Sunday four years later, another 3M scientist named Arthur Fry was singing in the church's choir. He used markers to keep his place in the hymnal, but they kept falling out of the book. Remembering Silver's adhesive, Fry used some to coat his markers. Success! With the weak adhesive, the markers stayed in place, yet lifted off without damaging the pages. 3M began distributing Post-it Notes nationwide in 1980 -- ten years after Silver developed the super weak adhesive. Today they are one of the most popular office products available. Post-itŪ

You know that white stuff you paint on paper to cover mistakes? It was originally called "mistake out" and was the invention of Bette Nesmith Graham, a divorcee who went to work in 1951 to support herself and her son. Though she found work as a typist, she unfortunately wasn't a very good one and developed a white tempura paint to hide her mistakes. Using her kitchen and garage as laboratory and factory, she gradually developed a product that other secretaries and office workers began to buy.

Vent holes have come in a number of different shapes. The most common is the heart, found on many Waterman's, Parkers, Sheaffer's, and Eversharps. In fact the word heart is sometimes used to mean vent hole. A round vent hole is seen on most vintage Parkers, but other shapes such as the "key hole" and a "pointed oval" can be seen on some early Parkers. Waterman's used quite a number of shapes, besides the "heart" including the "key hole" in the early 30's. Before Waterman's standardized their nibs, they manufactured or had manufactured a number of nibs with unusual vent holes, the "hole and horseshoe" and a "six pointed star". Conklin extended the use of the "crescent" shape, from their very successful filling system, to the shape of their vent hole in their nib.