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emeraldd
on Oct 5, 2020
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Show HN: URL Shortener Optimized for QR Code
huh ... Seems like the patents might be expired?
https://patents.google.com/patent/US8131597
https://patents.google.com/patent/US6199048
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Search:
https://patents.google.com/patent/US8131597 https://patents.google.com/patent/US6199048