Granted Patent
Utility
US 4,435,938 · App. 06/320,613
Vinyl siding attachment
Inventors:
Edward J. Rutkowski, Thomas R. Krowl
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Nov 12, 1981
Inventors
Edward J. Rutkowski
Thomas R. Krowl
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.