In a combination set, the records are sorted by group number and rank number. For the same patent number and kind code, the records are sorted by symbol position (F - First or L - Later); Among Later records, they were sorted by classification symbol and combination sets. This file is sorted by patent application document number sequence ascending. The Later records not in combination set are sorted by classification value (I - Invention or A - Additional), then by classification symbol order ascending. Patent Application Master Classification File contains classification information on all patent applications published by the U.
patents granted since 1790 are reclassified to reflect these class/subclass updates.
The Japanese F-Terms are not currently included in Acclaim IP.
All patent collections in Acclaim IP can be searched using the IPC system.
The alphanumeric symbols existing after the "/" in ECLA are converted into purely numeric symbols.
The resulting CPC format aligns with WIPO's specifications for IPC.