Granted Patent
Utility
US 5,406,041 · App. 08/149,398
Rotary vacuum valve and electric switch assembly
Inventors:
Sangman Hahn, Michael Molinari
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Nov 9, 1993
Inventors
Sangman Hahn
Michael Molinari
Assignee (at issue)
DELCO ELECTRONICS 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.