Granted Patent
Utility
US 5,158,440 · App. 07/793,237
Integrated centrifugal pump and motor
Inventors:
Paul V. Cooper, Lee J. Bulson
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Nov 8, 1991
Inventors
Paul V. Cooper
Lee J. Bulson
Assignee (at issue)
Ingersoll-Rand Company
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.