Granted Patent
Utility
US 6,434,954 · App. 09/579,158
Air circulation system for a chamber
Inventors:
John C. Hess, Loddie Alspach, Wagdy Wahba
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: May 25, 2000
Inventors
John C. Hess
Loddie Alspach
Wagdy Wahba
Assignee (at issue)
Qualmark 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.