| RE49259 | Methods and systems for managing a clearance gap in a piston engine | Nov 30, 20 | Oct 25, 22 | Mainspring Energy, Inc. |
| RE47540 | Internally cooled high compression lean-burning internal combustion engine | Jan 19, 17 | Jul 30, 19 | Nostrum Energy Pte, Ltd. |
| RE47143 | Decoupler assembly | Nov 08, 17 | Nov 27, 18 | Litens Automotive Partnership |
| 9995212 | Free piston engine | Apr 22, 15 | Jun 12, 18 | Aquarius Engines (A.M.) Ltd. |
| 9995206 | Intake air boost system for two-cycle engine having turbo-supercharger | Apr 08, 16 | Jun 12, 18 | Southwest Research Institute |
| 9995209 | Rotary engine | Mar 18, 15 | Jun 12, 18 | International Engine Intellectual Property Company, LLC |
| 9996991 | Engine generator | Apr 19, 17 | Jun 12, 18 | Yamaha Motor Power Products Kabushiki Kaisha |
| 9995201 | Low reactivity, compression-ignition, opposed-piston engine | Feb 11, 15 | Jun 12, 18 | Achates Power Inc. |
| 9995228 | Engine exhaust system | Mar 08, 16 | Jun 12, 18 | Ford Global Technologies, LLC |
| 9995210 | Control system for a generator | Mar 14, 13 | Jun 12, 18 | Thermo King Corporation |
| 9995199 | Control device for internal combustion engine | Dec 10, 15 | Jun 12, 18 | c/o TOYOTA JIDOSHA KABUSHIKI KAISHA |
| 9995189 | Engine driven working machine | Jul 14, 16 | Jun 12, 18 | Yamabiko Corporation |
| 9995141 | Sliding block for a scotch yoke reciprocating piston engine | May 08, 14 | Jun 12, 18 | Not available |
| 9995214 | Variable compression ratio device | Aug 10, 16 | Jun 12, 18 | Hyundai Motor Company |
| 9995213 | Asymmetrically-shaped combustion chamber for opposed-piston engines | Mar 31, 15 | Jun 12, 18 | Achates Power Inc. |
| 9995239 | Engine | Feb 18, 13 | Jun 12, 18 | Yanmar Co., Ltd.; Toyota Jidosha Kabushiki Kaisha; |
| 9995249 | Intake and exhaust system of internal combustion engine | Sep 20, 17 | Jun 12, 18 | Honda Motor Co. Ltd. |
| 9995204 | Method for operating an internal combustion engine with charge-air cooler | May 31, 12 | Jun 12, 18 | Ford Global Technologies, LLC |
| 9995227 | Apparatus and method for using negative pressure energy of engine | Oct 23, 14 | Jun 12, 18 | Belqi Foton Motor Co. Ltd.; Beijing ZHI KE Investment and Management Co., Ltd.; |
| 9995207 | Multi-stage turbocharger system | Dec 22, 16 | Jun 12, 18 | Cummins Turbo Technologies Limited |