Granted Patent
Utility
US 4,642,867 · App. 06/827,055
Brush seal manufacture
Inventors:
Gerald W. Hough, Ian Andrew Hunt
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Feb 7, 1986
Inventors
Gerald W. Hough
Ian Andrew Hunt
Assignee (at issue)
Rolls-Royce Corporation
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.