Granted Patent
Utility
US 4,511,380 · App. 06/561,883
Suspension and sealing of latticework and filters
Inventor:
Stephen M. Fetter
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Dec 15, 1983
Inventor
Stephen M. Fetter
Assignee (at issue)
Allis-Chalmers 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.