cpc Statistics

Now that we have the cpc subclasses in a database table we can do fun things like displaying the counts of classes per modification date. Wouldn't it be cool if the updated subclass data was available from uspto.gov via an rss feed? Or am I just crazy? ;-)

mod_date	count
2013.01	219,046
2013.09	161
2013.11	28
2013.12	9
2014.02	513
2014.06	7
2014.07	128
2014.09	270
2014.10	148
2014.11	201
2014.12	118
2015.01	6,025
2015.04	3,950
2015.05	141
2015.07	777
2015.09	66
2015.10	1,123
2015.11	277
2015.12	16
2016.01	159
2016.02	936
2016.05	2,337
2016.08	1,622
2016.11	1,029
2017.01	545
2017.02	283
2017.05	666
2017.08	4,014
2018.01	1,384
2018.02	695
2018.05	900
2018.08	842
2019.01	2,134
2019.02	992
2019.05	922
2019.08	641
2020.01	1,889
2020.02	1,112
2020.05	1,666
2020.08	1,078

mod_date links go to a sample rss feed.

Or we can display the number of subdivisions of each high level section letter.

letter	/00's	total
A	1,247	29,224
B	2,621	56,265
C	1,766	38,013
D	409	5,739
E	351	9,192
F	1,473	27,546
G	884	37,509
H	707	38,941
Y	345	16,421

Or we can display the total number of main group and subgroups at each indent level.

indent	count
0	9,803
1	48,133
2	69,554
3	62,190
4	34,945
5	17,714
6	8,145
7	3,679
8	1,588
9	1,259
10	730
11	489
12	621

Fun facts above based on data loaded when the most recent change date was 2020-08-01. The cpc scheme is available in xml or pdf from https://www.cooperativepatentclassification.org/cpcSchemeAndDefinitions/Bulk.html .

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