Granted Patent
Utility
US 5,151,010 · App. 07/579,405
Combined centrifugal and vacuum pump
Inventors:
Reijo Vesala, Vesa Vikman
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Sep 7, 1990
Inventors
Reijo Vesala
Vesa Vikman
Assignee (at issue)
A. Ahlstrom 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.