Granted Patent
Utility
US 4,922,997 · App. 07/165,083
Friction drive toroidal regenerator
Inventors:
Robert Hornblower Meyer, Ronald C. Pampreen, Kenneth W. Sawyer
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Mar 7, 1988
Inventors
Robert Hornblower Meyer
Ronald C. Pampreen
Kenneth W. Sawyer
Assignee (at issue)
WILLIAMS INTERNATIONAL CO., L.L.C.
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.