Difference between revisions of "Patent classification systems"
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| − | + | There have been many patent classification systems, and any that helpfully classify aero patents in our period are relevant to include here. | |
| + | * the [[CPC]] category system is the most modern and global, started 2010 | ||
| + | * the [[IPC]] is the predecessor to the CPC, started 1971, per Wang (2018) | ||
| + | * IPC1-7 - an IPC version or variant | ||
| + | * [[French patent classifications]] -- dated in 50-year gropus from about 1858 to 1904 then from 1904 to 1958 | ||
| + | * USPC -- US standards used officlally till at least 2013, start date uncertain | ||
| + | * [[NBER patent classification]] - a grouping of the USPC system into larger simpler clusters, used in economics research especially | ||
| + | * [[German patent classifications]] -- starting 1878 or thereabouts | ||
| + | * [[Canadian patent classifications]] -- seems to look a lot like the USPC but the history of it is not known yet ; it was used till circa 1989 | ||
| + | * [[Belgian patent classifications]] | ||
| + | |||
{{Techtype | {{Techtype | ||
|Enclosing categories=Techtype | |Enclosing categories=Techtype | ||
| − | |Subcategories=CPC; IPC; IPC1-7; French patent classifications; USPC; German patent classifications; Canadian patent classifications | + | |Subcategories=CPC; IPC; IPC1-7; French patent classifications; USPC; German patent classifications; Canadian patent classifications; NBER patent classification; Belgian patent classifications |
}} | }} | ||
Revision as of 22:47, 8 January 2019
There have been many patent classification systems, and any that helpfully classify aero patents in our period are relevant to include here.
- the CPC category system is the most modern and global, started 2010
- the IPC is the predecessor to the CPC, started 1971, per Wang (2018)
- IPC1-7 - an IPC version or variant
- French patent classifications -- dated in 50-year gropus from about 1858 to 1904 then from 1904 to 1958
- USPC -- US standards used officlally till at least 2013, start date uncertain
- NBER patent classification - a grouping of the USPC system into larger simpler clusters, used in economics research especially
- German patent classifications -- starting 1878 or thereabouts
- Canadian patent classifications -- seems to look a lot like the USPC but the history of it is not known yet ; it was used till circa 1989
- Belgian patent classifications
| Enclosing categories | Techtype |
|---|---|
| Subcategories | CPC, IPC, IPC1-7, French patent classifications, USPC, German patent classifications, Canadian patent classifications, NBER patent classification, Belgian patent classifications |
| Keywords | |
| Start year | |
| End year |
