For U.S. Classification Order - The number of patents shown for each class represents the total number of patents posted as an original reference for the current year. The first IPC listed is the best one-for-one reference to that U.S. Class as determined by our program. This IPC represents the largest single percentage of all patents originally referenced to that U.S. Class or it has the largest percentage of multiple IPC's having the same first three characters.
For International Patent Classification Order - the same information is shown as for the U.S. Classification Section, only in IPC order. The number of patents shown is the total number of patents posted to the IPC for the current year.
001-099 100-199 200-299 300-399 400-499 500-599 600-699 700-799 800-899 900-999
A00A-A99Z B00A-B99Z C00A-C99Z D00A-D99Z E00A-E99Z F00A-F99Z G00A-G99Z H00A-H99Z
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