Granted Patent
Utility
US 6,357,337 · App. 09/549,188
Spring brake actuator with sealed chamber and method for sealing
Inventors:
Francisco Alvarez, Mark Alan Davis
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Apr 14, 2000
Inventors
Francisco Alvarez
Mark Alan Davis
Assignee (at issue)
Holland Neway International, 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.