Granted Patent
Utility
US 6,584,791 · App. 09/826,106
Pressure equalization system and method
Inventors:
David Monk, Larry Pippin, Pantelis Hatzikazakis, William Z. Sun, Timothy Wampler, Charles E. Zimmerman
Patented Case
View Patent ↗
Granted: Jul 1, 2003
Filed: Apr 5, 2001
Inventors
David Monk
Larry Pippin
Pantelis Hatzikazakis
William Z. Sun
Timothy Wampler
Charles E. Zimmerman
Assignee (at issue)
Bristol Compressors, 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.