In some previous posts I faced issues related to IPC30 reclassification released from INPI/OST.
Such reclassification, like any reclassification, works well when you apply it to a univocal value; anyway it happens that it's very difficult to assign a main or unique ipc class to a patent, so how is it working, in respect to the number of classes given to applications when you apply it to all patent's IPCs?
Such reclassification, like any reclassification, works well when you apply it to a univocal value; anyway it happens that it's very difficult to assign a main or unique ipc class to a patent, so how is it working, in respect to the number of classes given to applications when you apply it to all patent's IPCs?
Now I'm disclosing some results about it's application to a wide extent of patents; following analysis refers to EPO, USPTO and WIPO (or better PCT procedure application) data, from sept 2010 Patstat ediction.
# classes | # of applications | % | cm % |
1 | 4813658 | 69,9% | 69,9% |
2 | 1558807 | 22,6% | 92,6% |
3 | 396745 | 5,8% | 98,3% |
4 | 90992 | 1,3% | 99,7% |
5 | 18326 | 0,3% | 99,9% |
6 | 3565 | 0,1% | 100,0% |
7 | 836 | 0,0% | 100,0% |
8 | 213 | 0,0% | 100,0% |
9 | 61 | 0,0% | 100,0% |
10 | 13 | 0,0% | 100,0% |
11 | 4 | 0,0% | 100,0% |
12 | 4 | 0,0% | 100,0% |
How does it change by splitting it by application authority?
Are there any remarcable pairs / triples of classes who appear more often?
The answer in next forthcoming post...
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