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BlackBerry's iconic keyboard patent has expired
(mobilesyrup.com)
This is a most excellent place for technology news and articles.
I have a 60% bluetooth keyboard that I'll use when I need to type on my phone. A pain to carry with me, but taking a whole laptop is sometimes even worse.
60% Bluetooth, but what's the other 40%?
Magic
They're on discount. You don't have to pay for the extra 40% of a keyboard.
Dolomite
You can get these folding keyboards that will fit in a pocket, often have a roughly-cell-phone-sized case.
https://www.amazon.com/s?k=folding+keyboard
Still another item to carry, but it might fit the niche you're looking for better if you're not happy with hauling a regular 60% keyboard. Larger than those Blackberry-style thumbboards.