Prior to that date, an estimated 9, patents had been issued. Defensive Publications T and Improvement patents AI are not included in this table. Some patent numbers, dating site patents displayed in the table, are 7 characters with the numeric portion padded with leading zeroes. Some numbers within a series may be unused. 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. A detailed Patent Technology Monitoring Team report, titled Issue Dates and Patent Numbers Sincewhich contains first patent numbers and the day of issue for patents issued sincealso may be of interest. In addition, the Patent and Trademark Office has a file that lists all patent numbers and their associated dates of grant.
That file may be accessed from: See the link labeled, "Click here to download the zipped Patent Grant Authority Files". Questions regarding this report should be directed to: Patent and Trademark Office Electronic Information Products Dating site patents - PTMT P. O Box Alexandria Dating site patents Is there a question about what the USPTO can or cannot do that you cannot find an answer for?
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