Granted Patent
Utility
US 6,793,715 · App. 09/932,426
Equipment air filter
Inventor:
Leslye Sandberg
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Aug 17, 2001
Inventor
Leslye Sandberg
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.