Granted Patent
Utility
US 6,443,728 · App. 09/812,056
Gas pipe ignitor
Inventors:
Carl D. Edberg, Raymond MacWhinnie, David J. Matteson, Raymond W. Cournoyer
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Mar 19, 2001
Inventors
Carl D. Edberg
Raymond MacWhinnie
David J. Matteson
Raymond W. Cournoyer
Assignee (at issue)
Alstom (Schweiz) AG
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.