Granted Patent
Utility
US 6,032,664 · App. 08/652,635
Pressure display for self contained breathing apparatus
Inventors:
Robert E. Gray, Paul D. Hiltman, R. David Lewis, Victor Speck
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: May 22, 1996
Inventors
Robert E. Gray
Paul D. Hiltman
R. David Lewis
Victor Speck
Assignee (at issue)
International Safety Instruments, 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.