| 9995392 | Method for manufacturing unitary hollow pistons | Oct 16, 17 | Jun 12, 18 | Elkhart Products Corporation |
| 9982781 | Pistons | Oct 14, 15 | May 29, 18 | Fisher Controls International LLC |
| 9964212 | Wear resistant insert for pneumatic scotch yoke piston | Jul 08, 15 | May 08, 18 | Hamilton Sundstrand Corporation |
| 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. |
| 9958067 | Liquid dispensing syringe | Jun 12, 07 | May 01, 18 | Nordson Corporation |
| 9951867 | Piston damper | Oct 26, 11 | Apr 24, 18 | NIFCO INC. |
| 9945320 | Piston for an internal combustioin engine | Jul 30, 14 | Apr 17, 18 | Federal-Mogul Nurnberg GmbH |
| 9945394 | Separating device for fluid media | Sep 07, 13 | Apr 17, 18 | Hydac Technology GmbH |
| 9945480 | Piston assembly including a polymer coating with hard particles applied to sliding surfaces | Oct 26, 12 | Apr 17, 18 | Federal-Mogul LLC |
| 9915223 | Piston, method of construction, and piston body portions thereof | Apr 12, 16 | Mar 13, 18 | FEDERAL-MOGUL LLC |
| 9915315 | Production of multi-part, joined valve components in hydraulic applications with joint sealing profiles | May 04, 16 | Mar 13, 18 | GKN SINTER METALS HOLDING GMBH |
| 9909582 | Pump with plunger having tribological coating | Jan 30, 15 | Mar 06, 18 | CATERPILLAR INC. |
| 9903309 | Welded piston assembly | Jan 05, 16 | Feb 27, 18 | MAHLE INTERNATIONAL GMBH |
| 9897207 | Variable-volume head | May 24, 14 | Feb 20, 18 | GE OIL & GAS COMPRESSION SYSTEMS, LLC |
| 9869179 | Engine with piston that overshoots cylinder wall exhaust port | Jul 14, 16 | Jan 16, 18 | Aquarius Engines (A.M.) Ltd. |
| 9869267 | Reciprocating piston for a reciprocating piston engine and reciprocating piston engine, and cylinder of a reciprocating piston engine | Nov 14, 11 | Jan 16, 18 | Geist, Bertwin R. |
| 9863491 | Piston for a brake caliper of a disk brake | Aug 16, 12 | Jan 09, 18 | CONTINENTAL TEVES AG & CO. OHG |
| 9856821 | Open-faced piston assembly | Oct 14, 16 | Jan 02, 18 | ETAGEN, INC. |
| 9849482 | Hydraulic pump and piston for such a hydraulic pump | May 16, 14 | Dec 26, 17 | HYDAC DRIVE CENTER GMBH |