Granted Patent
Utility
US 6,231,047 · App. 09/087,243
Brush seal
Inventors:
Matthew D. Cunningham, Robert Menendez, James A. Henderson, Chih-yuan Shia, William J. Casey, William Smith
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: May 29, 1998
Inventors
Matthew D. Cunningham
Robert Menendez
James A. Henderson
Chih-yuan Shia
William J. Casey
William Smith
Assignees (at issue)
EG&G Engineered Products
PFERD MILWAUKEE BRUSH COMPANY, 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.