Granted Patent
Utility
US 6,547,287 · App. 09/977,003
Duct connecting system having integral transverse flanges
Inventors:
Ashok Shah, Richard Blum
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Oct 11, 2001
Inventors
Ashok Shah
Richard Blum
Assignee (at issue)
Met-Coil System Corp.
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.