Granted Patent
Utility
US 4,988,884 · App. 07/275,119
High temperature resistant flame detector
Inventors:
Robert A. Dunbar, John M. McClelland
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Nov 22, 1988
Inventors
Robert A. Dunbar
John M. McClelland
Assignee (at issue)
Walter Kidde Aerospace, Inc.
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.