Would you pay $180 for a new type of writing instrument? Image via The New York Times On a crisp fall morning in late October 1945, approximately 5,000 shoppers rushed the 32 nd street Gimbel’s ...
[Bill Hammack], aka the [EngineerGuy] is at it again, this time explaining how retractable ballpoint pens work. In this excellent video, he describes the simple (but remarkably sophisticated) ...
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