| 2022/0145,990 | WIRE FOR PISTON RING, AND MANUFACTURING METHOD OF PISTON RING | Dec 17, 20 | May 12, 22 | Not available |
| 2017/0016,537 | OIL SCRAPER PISTON RING AND METHOD FOR PRODUCING AN OIL SCRAPER PISTON RING | Mar 04, 15 | Jan 19, 17 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2015/0354,702 | PISTON RING FOR INTERNAL COMBUSTION ENGINES WITH INCREASED FATIGUE STRENGTH, AND METHOD FOR PRODUCING SAME | Oct 29, 13 | Dec 10, 15 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2015/0240,943 | REDUCED FRICTION OIL CONTROL PISTON RINGS | Sep 24, 13 | Aug 27, 15 | Not available |
| 2015/0130,143 | METHOD FOR PRODUCING AN OIL SCRAPER PISTONG RING | Apr 25, 13 | May 14, 15 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2014/0311,437 | PISTON RING FOR A PISTON OF AN INTERNAL COMBUSTION ENGINE, AND A METHOD FOR PRODUCING SAME | Dec 21, 11 | Oct 23, 14 | MAHLE INTERNATIONAL GMBH |
| 2014/0265,148 | LOW TENSION PISTON RINGS AND METHOD FOR MANUFACTURING THE SAME | Mar 14, 13 | Sep 18, 14 | FEDERAL-MOGUL LLC |
| 2014/0008,874 | METHOD FOR PRODUCING PISTON RINGS | Feb 02, 12 | Jan 09, 14 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2013/0187,340 | METHOD FOR PRODUCING A PISTON RING | Sep 02, 11 | Jul 25, 13 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2013/0187,341 | METHOD FOR PRODUCING A PISTON RING | Aug 13, 11 | Jul 25, 13 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2013/0181,410 | INTERNAL COMBUSTION ENGINE OIL RING | Mar 31, 11 | Jul 18, 13 | NIPPON PISTON RING CO., LTD. |
| 2013/0181,411 | METHOD FOR PRODUCING A PISTON RING | Sep 02, 11 | Jul 18, 13 | FEDERAL-MOGUL BURSCHEID GMBH, FEDERAL-MOGUL BURSCHEID RING, |
| 2013/0174,419 | METHOD FOR PRODUCING A PISTON RING | Jun 29, 11 | Jul 11, 13 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2013/0084,031 | SLIDING ELEMENT WITH DLC COATING | Jul 03, 12 | Apr 04, 13 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2012/0228,831 | PISTON RING | Oct 14, 10 | Sep 13, 12 | FEDERAL-MOGUL BURSCHEID GMBH |
| 2010/0090,416 | PISTON FOR INTERNAL COMBUSTION ENGINES | Nov 29, 07 | Apr 15, 10 | MAHLE INTERNATIONAL GMBH, MAHLE METAL LEVE S/A, |
| 2009/0255,113 | Process For Hardening An Annular Groove Of A Piston Head By Means Of Laser Beams And A Piston Produced By The Process | Feb 13, 07 | Oct 15, 09 | KS KOLBENSCHMIDT GMBH |
| 2009/0255,504 | Method of Hardening Surface of Metallic Part, Piston, Cylinder Head, and Cylinder Block Each Produced Using the Surface-Hardening Method, and Process for Producing the Same | Mar 12, 07 | Oct 15, 09 | YANMAR CO., LTD. |
| 2009/0229,098 | Piston ring installation | Mar 14, 08 | Sep 17, 09 | Not available |
| 2009/0199,809 | Fluid Machine | Jun 04, 07 | Aug 13, 09 | SANDEN HOLDINGS CORPORATION |