CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0027.jpg)
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0077.jpg)
CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-tur
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0006.jpg)
CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-tur
US11156181, PDF, Internal Combustion Engine
![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Atkinson_Opposed_Piston_Engine.gif/180px-Atkinson_Opposed_Piston_Engine.gif)
Opposed-piston engine - Wikipedia
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0014.jpg)
CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-tur
![](http://www.leydesdorff.net/cpc_cos/index_files/image001.jpg)
Maps of CPC4; USPTO data; cosine normalized
![](https://2.bp.blogspot.com/-3U3iWGc4nDM/T46iRM6EawI/AAAAAAAAAKY/bLErVziJXXE/s1600/aaa.png)
Aircraft Piston Engine Operation Aircraft Maintenance Engineering-Mechanical
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0007.jpg)
CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-tur
![](https://ars.els-cdn.com/content/image/1-s2.0-S0306261921013052-gr1.jpg)
Technological evolution of internal combustion engine vehicle: A patent data analysis - ScienceDirect
![](https://s24806.pcdn.co/wp-content/uploads/2021/04/Patents-041421-970.jpg)
Dallas Invents: 145 Patents Granted for Week of March 30 » Dallas Innovates
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0045.jpg)
CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-tur
![](https://www.uspto.gov/web/patents/classification/cpc/image/cpc-definition-F02B/cpc-def-F02B-0001.jpg)
CPC Definition - F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-tur