https://patentimages.storage.googleapis.com/11/03/a6/cf2a9bedbbae12/US1775057.pdf … also refers only to varying by Shift, as does https://patentimages.storage.googleapis.com/29/1e/41/dedfa21f1bbe9d/US1937047.pdf …
Thanks! Either way it seems / and ? shared the key before electrics came around?
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Yeah, that seems to be the one solid conclusion that can be drawn from this morning's patent digging
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Maybe I just need to build a searchable library of typewriter keyboard layouts 1900–1930, as precisely dated as possible.
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