The cartridges of conventional ball point pens are open to permit ink to be fed to the point. The secret behind the Fisher Space Pen lies in the unique design characteristics of the ink and the high precision manufacturing tolerances of the ball point and socket. The ink is fed to the ball point by gas pressure permitting the pen to write in any position. An additional benefit of the closed design is that it keeps the pen from drying out giving the Fisher Space Pen an estimated 100 year shelf life.

Conceived in a dream in July 1948, Paul Fisher was soon machining a new pen design shaped from solid aluminum. It became our first Fisher ball point pen, the #400 Chrome Bullet Pen, and arguably the most popular pen of the twentieth century. Cited as an outstanding example of industrial art, the classic design of the Fisher Bullet Pen has been exhibited for years in the New York Museum of Modern Art. The Bullet's timeless styling has been the topic of many art books and magazine articles. Often imitated but never duplicated, the Fisher Bullet continues to be their most popular pen.