Granted Patent
Utility
US 4,867,769 · App. 07/296,692
Supporting structure for ceramic tubes in a gas system
Inventors:
Noriyuki Oda, Katsumi Higashi, Hiroshi Maeno
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jan 13, 1989
Inventors
Noriyuki Oda
Katsumi Higashi
Hiroshi Maeno
Assignee (at issue)
ASAHI GLASS 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.