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| Application No. | Application Title | Issue Date |
| 20090145393 | Valve Stem Seal With Gas Relief Features A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, and a pressure relief lip engaging a valve guide. The pressure relief lip can have a sealing configuration and a venting configuration. The ve... | 06/11/2009 |
| 20070240696 | Poppet valve and engine using same One embodiment of the present invention provides a poppet valve offering an increased valve area, comprising an outer valve head having an outer valve port and an inner valve head having an inner valve port. The inner valve head is rotatable relative to the outer valve ... | 10/18/2007 |
