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A comment on Building an E-Ink Laptop. Parent comment

Re:Building an E-Ink Laptop by Nition on Tuesday February 23, 2021 @11:04PM (#26246455)
One thing I don't get: Aren't the patents from the 90s? And US patents last 20 years, right? So why haven't they expired already?
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Re:Building an E-Ink Laptop by Matrixik on Wednesday February 24, 2021 @01:28AM (#26247224)
They are constantly creating new patents:

https://patents.justia.com/assignee/e-ink-corporation

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Re:Building an E-Ink Laptop by Nition on Wednesday February 24, 2021 @02:45AM (#26247627)
Man, I didn't expect that to be 36 pages long. Crazy amount of patents.
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Re:Building an E-Ink Laptop by monocasa on Tuesday February 23, 2021 @11:24PM (#26246552)
They've got patents with issue dates through the mid 2000s.
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Re:Building an E-Ink Laptop by GoOnThenDoTell on Tuesday February 23, 2021 @11:55PM (#26246731)
Is there a particular year coming where it becomes a free-for-all?
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