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Howdy, I have a slight correction to the page. You note "no patent identified" for Ken Thompson's regular expression work from 1968. To the contrary, Bell Labs
by jonstewart 8y ago
Howdy, I have a slight correction to the page. You note "no patent identified" for Ken Thompson's regular expression work from 1968. To the contrary, Bell Labs was granted a patent in 1971 for ken's work, with a priority date of 1967. See https://patents.google.com/patent/US3568156A/en https://patents.google.com/patent/US3568156A/en.