Granted Patent
Utility
US 4,423,284 · App. 06/384,783
Moulding duct
Inventor:
Steve E. Kaplan
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Jun 4, 1982
Inventor
Steve E. Kaplan
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.