Granted Patent
Utility
US 4,404,483 · App. 06/238,459
Method of fabricating a wet-rotor circulator and circulator produced thereby
Inventor:
Benno Lebkuchner
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Feb 26, 1981
Inventor
Benno Lebkuchner
Assignee (at issue)
TACO, 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.