Granted Patent
Utility
US 6,606,968 · App. 10/214,260
Water heater unit
Inventors:
Kazushi Iwama, Akihito Yamashita
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Aug 8, 2002
Inventors
Kazushi Iwama
Akihito Yamashita
Assignee (at issue)
TAKAGI INDUSTRIAL CO. LTD.
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.