| Patents > Authority File > Reexamination Certificate File > Reexamination Certificates File Layout |
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Reexamination Certificates file layout
The first field is eight positions and contains the "Document Number".
The second field is eight positions and contains the "Publication Date" in a YYYYMMDD format.
The third field is two positions and contains the patent "Kind of Document Code".
Example:
B5093617 20001219 B1 B4490209 20001219 B2 C5775534 20010102 C1 CD350855 20020108 C1 CRE33507 20020528 F1 C4940488 20020618 C2 BRE33209 19960116 F2
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