Granted Patent
Utility
US 6,540,504 · App. 10/120,048
Combustion appliance with flame blocking device
Inventors:
Toshihiro Kobayashi, Hideo Chikazawa
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Apr 10, 2002
Inventors
Toshihiro Kobayashi
Hideo Chikazawa
Assignee (at issue)
Paloma Industries, 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.