find anything new?
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Replying to @obra
Not really, but it was more about me trying to build something physical and just checking out what was out there. Although the +/– 1 in the last photo was a new discovery (and there were many of those!).
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Replying to @mwichary
Yeah. There were a lot of...fascinating things for calculators. Reading google patents and old electronics catalogs on the archive this afternoon lost me a good few hours.
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Replying to @mwichary
I may have filtered it down that far. Do you ...want more?
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Replying to @mwichary
What I've sent so far: https://patentimages.storage.googleapis.com/a6/c0/2f/018304b2df229d/US2875537.pdf … https://patentimages.storage.googleapis.com/42/ee/53/2bea5488b1142c/US862343.pdf … https://patentimages.storage.googleapis.com/45/e8/69/5fd59a25799a01/US2981020.pdf …
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Replying to @mwichary
https://patentimages.storage.googleapis.com/52/b6/f6/bcbcf6583f950c/US2583184.pdf … https://patentimages.storage.googleapis.com/1f/47/41/7147a728778cd4/US3968583.pdf … (Arabic) https://patentimages.storage.googleapis.com/b5/af/ef/f9188470bbcbf5/US1091335.pdf … (1912) https://patentimages.storage.googleapis.com/bd/cc/cd/f208e92cf4860b/US3938140.pdf … (1976) https://patentimages.storage.googleapis.com/1b/c5/d8/ecf302290cf758/US3945001.pdf … (1976, 7 segments, but curved)
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A wild one from 1926: https://patentimages.storage.googleapis.com/d3/a2/50/4615f3218925e7/US1660254.pdf …
2 replies 0 retweets 0 likes
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