Granted Patent
Utility
US 4,656,805 · App. 06/808,028
Paper battens
Inventor:
Daniel A. Winkowski
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Dec 12, 1985
Inventor
Daniel A. Winkowski
Assignee (at issue)
National Gypsum Company
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.