Jozefa O. Armfelt, US2088283A
Device for Moistening Envelopes and the Like.
Image credit: Armfelt, J.O. (1935)
On July 27, 1937, Jozefa Olympia Armfelt of Kulla, Sweden, patented a device for moistening envelopes and other gummed surfaces. The device used a water-filled container with a wick in a bent or angled tube that automatically delivered just the right amount of moisture, preventing spills or over-wetting while remaining simple and easy to manufacture.
Date of Application: 8 April 1935
Date of Issuance: 27 July 1937
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Francesca Chiaradia
PhD Candidate in Economics
My research interests include innovation, law, and information economics.