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Lernstift digital pen uses vibrations to improve spelling and penmanship
German inventors create a digital pen that vibrates when you make mistakes – New York Daily News
Lernstift pen vibrates if you make a mistake while writing - Mobiletor.com
Lernstift Smartpen checks spelling as you write | CNN Business
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Closeup of Green Pen in the Middle of Upright Tickmark 3D Illustration Stock Illustration - Illustration of choice, test: 143333716
Lernstift: The Fountain Pen With Built-In Spell-Check (VIDEO) | HuffPost UK Tech
Tangi Hujra - The Lernstift smartpen checks your spelling as you write Lernstift (German for "learning pen") is a digital pen carrying not only ink inside its casing but also a tiny
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Lernstift: A Linux Based Smart Pen
Lernstift: The pen that checks for spelling errors on PAPER and vibrates when you make a mistake | Daily Mail Online