Granted Patent
Utility
US 6,003,814 · App. 08/668,434
Double-walled duct assembly for aircraft anti-icing conduit systems
Inventors:
Walter E. Pike, Jan C. Shafer
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Jun 17, 1996
Inventors
Walter E. Pike
Jan C. Shafer
Assignee (at issue)
Seniors Flexonics Inc. Stainless Steel Products Division
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.