Granted Patent
Utility
US 5,437,124 · App. 08/378,101
Rigid backbone enhancement for extruded profiles
Inventors:
Michael D. Ahlfeld, David C. Froehlich
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Jan 26, 1995
Inventors
Michael D. Ahlfeld
David C. Froehlich
Assignee (at issue)
Schlegel Corporation
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.