![TIL The Fisher Pen Co. patented a sealed, pressurised ink cartridge for the anti-gravity pen in 1966. The "thixotropic” ink is close to a solid before being stirred & as it's stirred TIL The Fisher Pen Co. patented a sealed, pressurised ink cartridge for the anti-gravity pen in 1966. The "thixotropic” ink is close to a solid before being stirred & as it's stirred](https://external-preview.redd.it/XPW7CVzafLIgPXPnHD0XnIZVgK4svwm0uUwKTuZPLAQ.jpg?auto=webp&s=b2c1ccbb004cc671bc179a037955fe3440d1a515)
TIL The Fisher Pen Co. patented a sealed, pressurised ink cartridge for the anti-gravity pen in 1966. The "thixotropic” ink is close to a solid before being stirred & as it's stirred
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The Fisher Space Pen Boldly Writes Where No Man Has Written Before | Arts & Culture | Smithsonian Magazine
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