| 2020/0056,480 | ENGINE WITH WORK STROKE AND GAS EXCHANGE THROUGH PISTON ROD | Sep 27, 19 | Feb 20, 20 | Aquarius Engines (A.M.) Ltd. |
| 2019/0390,628 | METHODS AND APPARATUS FOR AN ACTIVELY COOLED CYLINDER BLOCK | Jun 25, 19 | Dec 26, 19 | Not available |
| 2018/0209,374 | SYSTEM AND METHOD FOR POSITIONING AN INSERT IN AN ENGINE | Jan 26, 17 | Jul 26, 18 | Not available |
| 2018/0016,956 | ENGINE AND ENGINE-DRIVEN WORKING MACHINE | Jan 29, 16 | Jan 18, 18 | HITACHI KOKI CO., LTD. |
| 2017/0159,600 | GENERAL PURPOSE ENGINE | Dec 03, 15 | Jun 08, 17 | KAWASAKI JUKOGYO KABUSHIKI KAISHA |
| 2017/0045,015 | ENGINE | Apr 24, 15 | Feb 16, 17 | YAMAHA MOTOR POWER PRODUCTS KABUSHIKI KAISHA |
| 2015/0053,154 | Monoblock Engine | Mar 26, 13 | Feb 26, 15 | Not available |
| 2015/0026,988 | HAND-HELD WORK IMPLEMENT | Jul 28, 14 | Jan 29, 15 | ANDREAS STIHL AG & CO. KG |
| 2010/0199,931 | Portable handheld work apparatus having an internal combustion engine | Feb 09, 10 | Aug 12, 10 | ANDREAS STIHL AG & CO. KG |
| 2010/0192,906 | INDUCTION AND FUEL DELIVERY SYSTEM FOR PISTON ENGINE | Nov 06, 06 | Aug 05, 10 | DAVIES, DAVID |
| 2009/0188,451 | ENGINE COVER WITH COOLING FINS | Jan 21, 09 | Jul 30, 09 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 2008/0141,956 | DOUBLE PISTON CYCLE ENGINE | Feb 29, 08 | Jun 19, 08 | Tour Engine, Inc. |
| 2007/0034,173 | Upright heat dispensing fins of cylinder body | Aug 09, 05 | Feb 15, 07 | JIN HSIN HO MOLD ENTERPRISE CO., LTD. |
| 2007/0034,174 | Horizontal heat dispensing fins of cylinder body | Aug 09, 05 | Feb 15, 07 | JIN HSIN HO MOLD ENTERPRISES CO., LTD. |
| 2005/0109,292 | Cooling unit for air-cooled internal combustion engine | Nov 16, 04 | May 26, 05 | HONDA MOTOR CO., LTD. |
| 2001/0015,182 | Overhead cam engine with dry sump lubrication system | Dec 18, 00 | Aug 23, 01 | Tecumseh Products Company |