Patent maintenance fee events and description files

Patent maintenance fee events (SEP 1, 1981 - present)

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Contains recorded maintenance fee events for patents granted from September 1, 1981 to present. Each new weekly file (Tuesday) is cumulative.
Contains recorded maintenance fee events for patents granted from September 1, 1981 to present. Each new weekly file (Tuesday) is cumulative with a file format of ASCII.
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2020-08-11   Download (122.47 MB)

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