Granted Patent
Utility
US 4,435,936 · App. 06/346,402
Metal stud
Inventor:
Edward J. Rutkowski
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Feb 8, 1982
Inventor
Edward J. Rutkowski
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.