Granted Patent
Utility
US 4,199,452 · App. 05/839,011
Jet aeration channel system
Inventor:
Mikkel G. Mandt
Patented Case
View Patent ↗
Granted: Apr 22, 1980
Filed: Oct 3, 1977
Inventor
Mikkel G. Mandt
Assignee (at issue)
Houdaille Industries, Inc.
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.