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Please contact the server administrator, [email protected] inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an Error Document to handle the request.
The following table displays the calendar year along with the first corresponding document number issued in each year for selected patent document types (utility, design, plant, and reissue patents and statutory invention registrations) (*) The current patent numbering system began with a patent issued on July 13, 1836.
Prior to that date, an estimated 9,957 patents had been issued.
Defensive Publications (T) and Improvement patents (AI) are not included in this table.
(**) Reissue patents were not separately numbered until 1838.
Some patent numbers, as displayed in the table, are 7 characters with the numeric portion padded with leading zeroes. Therefore, the number of patents granted during a year cannot be determined by simply subtracting the number of the first patent issued in one year from the number of the first patent issued in the next year.
The user should note that while the data in this table have been checked, it still is possible that inadvertent errors remain.