Granted Patent
Utility
US 6,256,947 · App. 09/355,401
Method and apparatus for a tubular skylight system
Inventor:
Dennis Grubb
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Oct 14, 1999
Inventor
Dennis Grubb
Assignee (at issue)
Solatube 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.