Y10T29/49309 - CPC Classification Index

ClassID:

245359 ⎘

Y10T29/49309 - CPC Classification

Classification description:

Metal working; Method of mechanical manufacture; Prime mover or fluid pump making; Poppet or I.C. engine valve or valve seat making; Composite or hollow valve stem or head making including forging

Recent Application in this class:

20140366373

2014-12-18

Method for producing a hollow engine valve

20140283384

2014-09-25

Method of manufacturing a valve for an internal combustion engine

20140033532

2014-02-06

Method for production of valve head portion of hollow engine valve and hollow engine valve

20130313463

2013-11-28

Method for production of valve head portion of hollow engine valve and hollow engine valve

20120255175

2012-10-11

Method for producing hollow engine valve

20120246934

2012-10-04

Method for producing metallic-sodium-filled engine valve

20120228538

2012-09-13

Method for manufacturing valve umbrella portion of hollow engine valve, press device of valve umbrella portion of hollow engine valve, and hollow engine valve

20110174259

2011-07-21

Method for production of valve head portion of hollow engine valve and hollow engine valve