| 9963968 | Timed gas exchange in engine using piston as exhaust valve | Jul 14, 16 | May 08, 18 | Aquarius Engines (A.M.) Ltd. |
| 9963969 | Piston assembly for internal combustion engine | Jul 14, 16 | May 08, 18 | Aquarius Engines (A.M.) Ltd. |
| 9945319 | Method and fuel supply system for a progressive impulse internal combustion engine | Oct 20, 15 | Apr 17, 18 | Not available |
| 9938926 | Air leading-type stratified scavenging two-stroke internal-combustion engine | Oct 02, 15 | Apr 10, 18 | Yamabiko Corporation |
| 9938890 | Uniflow two-stroke engine | Jul 14, 15 | Apr 10, 18 | Honda Motor Co. Ltd. |
| 9926821 | Cylinder lubrication system for two-stroke engine | Oct 15, 14 | Mar 27, 18 | Honda Motor Co. Ltd. |
| 9874141 | Internal combustion engines | Oct 16, 14 | Jan 23, 18 | COX POWERTRAIN LTD. |
| 9869179 | Engine with piston that overshoots cylinder wall exhaust port | Jul 14, 16 | Jan 16, 18 | Aquarius Engines (A.M.) Ltd. |
| 9845680 | Gas exchange through engine piston rod | Jul 14, 16 | Dec 19, 17 | Aquarius Engines (A.M.) Ltd. |
| 9816431 | Stratified scavenging two-cycle engine | Apr 23, 12 | Nov 14, 17 | HITACHI KOKI CO., LTD. |
| 9784211 | Piston for an internal combustion engine | Jul 18, 13 | Oct 10, 17 | MAHLE INTERNATIONAL GMBH |
| 9702318 | Two-stroke engine | Sep 10, 15 | Jul 11, 17 | ANDREAS STIHL AG & CO. KG |
| 9695738 | Uniflow two-stroke engine | Mar 06, 15 | Jul 04, 17 | HONDA MOTOR CO., LTD. |
| 9695739 | Asymmetric transfer and intake in two-strokes | May 19, 15 | Jul 04, 17 | Not available |
| 9689259 | Engine with compression and momentum stroke | Jul 14, 16 | Jun 27, 17 | Aquarius Engines (A.A.) Ltd. |
| 9494104 | Cylinder with multiple transfer ports for an internal combustion engine | Oct 15, 13 | Nov 15, 16 | BRP US INC. |
| 9441573 | Two-stroke reciprocating piston injection-ignition or compression-ignition engine | Dec 09, 15 | Sep 13, 16 | Combustion Engine Technologies, LLC |
| 9371751 | Two stroke combustion engine | Nov 27, 07 | Jun 21, 16 | ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP |
| 9316145 | Two-stroke engine | Jan 31, 13 | Apr 19, 16 | MAKITA CORPORATION |
| 9291090 | Air intake porting for a two stroke engine | May 22, 14 | Mar 22, 16 | GE OIL & GAS COMPRESSION SYSTEMS, LLC |