Granted Patent
Utility
US 6,642,476 · App. 09/909,788
Apparatus and method of forming orifices and chamfers for uniform orifice coefficient and surface properties by laser
Inventor:
Christoph Hamann
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Jul 23, 2001
Inventor
Christoph Hamann
Assignee (at issue)
Siemens Automotive Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.