Patent classification systems
Jump to navigation
Jump to search
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
- NBER patent classification - a grouping of the USPC system into larger simpler clusters, used in economics research especially
National systems
- Austrian patent classifications
- Belgian patent classifications
- British patent classifications
- 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
- French patent classifications -- dated in 50-year gropus from about 1858 to 1904 then from 1904 to 1958
- German patent classifications -- starting 1878 or thereabouts
- Swiss patent classifications
- USPC -- US standards used officlally till at least 2013, start date uncertain
| Enclosing categories | Techtype |
|---|---|
| Subcategories | CPC, IPC, IPC1-7, French patent classifications, USPC, German patent classifications, Canadian patent classifications, NBER patent classification, Belgian patent classifications, British patent classifications, Swiss patent classifications, Austrian patent classifications |
| Keywords | |
| Start year | |
| End year |
