Granted Patent
Utility
US 5,771,852 · App. 08/811,334
Poppet valve with embossed neck structure
Inventors:
Rudy J. Heimann, Jr., Victor Levin, William Neumann, Joseph L. Palko, Robert Southam
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Mar 4, 1997
Inventors
Rudy J. Heimann, Jr.
Victor Levin
William Neumann
Joseph L. Palko
Robert Southam
Assignee (at issue)
TRW Limited
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.