Granted Patent
Utility
US 6,397,806 · App. 09/864,303
Engine valve assembly for internal combustion engine
Inventors:
Hiroaki Imai, Hirokazau Uehara, Seiji Tsuruta
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: May 25, 2001
Inventors
Hiroaki Imai
Hirokazau Uehara
Seiji Tsuruta
Assignee (at issue)
Unisia Jecs 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.