Granted Patent
Utility
US 6,672,009 · App. 09/703,533
Window sash position maintainer
Inventors:
Lenny Wong, Leslie B. Hendrickson
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Nov 1, 2000
Inventors
Lenny Wong
Leslie B. Hendrickson
Assignee (at issue)
Marvin Lumber and Cedar Company, LLC
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.