Us patent dating

To actually view the patent images you will need a plug in for your browser, Internet Explorer, Netscape, or Opera, called a Tiff viewer.

The link below is to a free TIFF viewer you can download and install this is one of the ones recommended by the patent office.

(**) 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.

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Inventors are encouraged to search the USPTO's patent database to see if a patent has already been filed or granted that is similar to your patent.

Dating and matchmaking have been around for a long time.

A patent date is when something was patented, not when it was actually made, many items were manufactured for many years after it the patent was granted.

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 Since 1836, which contains first patent numbers and the day of issue for patents issued since 1963, also may be of interest. Patent and Trademark Office Electronic Information Products Division - PTMT P.